Devices and methods for forming a recess in a substrate

Abstract

A template device 100 is provided for use in forming a recess or opening in a door frame or other substrate for accommodating a piece of hardware. The template device has an aperture 102 for forming

Description

The present disclosure relates to jigs for use in carpentry, and in particular, but not exclusively, for use in fitting doors within a door frame. More particularly, the present disclosure relates to jigs providing a template for forming recesses in a door frame to accommodate a door strike. The disclosure also relates to methods of forming recesses in a door frame to accommodate a door strike. Many tasks in the field of carpentry require the formation of recesses in a substrate to accommodate a variety of fixtures, fittings or other hardware, such as door hinges, latches and door strikes, for example. Traditionally, such recesses would be formed by hand, for example using a chisel or similar hand-cutting tool, requiring a high degree of skill and precision on the part of the carpenter. Moreover, forming such recesses by hand is time consuming, especially where a large number of recesses are to be formed (for example when fitting a large number of doors in the same property). More recently, many such tasks can be performed using machinery such as routers, which speeds up the task significantly. However, the use of such machinery generally requires the use of a jig or templating device, to guide the router or cutting tool during the cutting operation. For many tasks, simple jigs defining standardised cutting templates can be used. However, hardware to be fitted can differ significantly in shape and dimensions, meaning that a single template cannot be used for all hardware. A common solution to this is the provision of a jig comprising a plurality of templates that can be selectively inserted into the jig, according to the shape and dimensions of the hardware to be installed. The user can then select the template that most closely matches the hardware to be installed, and use this to form a recess for accommodating the hardware. This approach has a number of drawbacks. Firstly, there is a limit to the number of templates that can be provided. With increasing variation in the shape and dimensions of hardware that may be used for different installations, it is impossible to provide suitable templates to match all possibilities. This may lead to recesses that do not exactly match the hardware, which is aesthetically undesirable, and / or require the recess to be formed wholly or partially by hand to adjust the dimensions. Secondly, even where a large number of templates are provided, the burden on the user to find and select the appropriate template is time consuming and prone to error. Furthermore, such templates can be easily lost. It is known to provide jigs that define adjustable templates, wherein various dimensions of the template can be adjusted according to the dimensions of the hardware to be installed. However, such jigs can be difficult to set up appropriately. The present invention arose in an attempt to address the abovementioned problems, and in particular to provide an adjustable jig for the formation of recesses when fitting a door in a door frame, that is easy for the user to set up. According to a first aspect of the present invention, there is provided a jig for use in forming a recess in a door frame for accommodating a door strike, the jig comprising: a first templating device comprising a body element arranged to attach to a door frame, in use, the body element comprising an opening extending through the body element, the first templating device defining a face plate aperture aligned with the opening to provide a template for forming a recess in said door frame for a face plate of a door strike, wherein at least one dimension of the face plate aperture is adjustable; and a second templating device defining a mortice aperture providing a template for forming a mortice recess in said door frame, wherein at least one dimension of the mortice aperture is adjustable independently of the face plate aperture, wherein the second templating device comprises a body element that is removably attachable to the body element of the first templating device in a fixed position so as to locate the mortice aperture in a predetermined position overlying the opening of the body element of the first templating device. The mortice aperture can be positioned so as to overlie the opening of the body element of the first templating device, without requiring further adjustment of the at least one dimension of the face plate aperture. The position of the mortice aperture is predetermined relative to the position of the face place aperture, in use. The second templating device may be removably attachable to the first templating device in a fixed position so as to allow the mortice aperture to overlie the plate aperture, in use. The problem of variable hardware dimensions is particularly heightened in the installation of a door strike (also commonly referred to as a “strike plate” or “door keep”). A door strike comprises a face plate arranged to be located within a recess of the door frame. The face plate has at least one opening through which a latch, snib or deadlock of the door (or other locating / securing member of the door mechanism) extends, in use, into a mortice recess formed in the door frame, so as to secure the door in place within the door frame. A door strike may comprise a back box located on a rear surface of the face place to surround the opening, which back box may be formed integrally with or permanently attached to (e.g. welded to) the rear surface of the face plate. Alternatively, the back box may be a so-called “dust-box”, which is attachable to the rear surface of the face plate to surround the opening. The face plate may comprise a tongue portion adjacent the opening, forming a T-shaped or L-shaped face plate. When installed, the tongue of the face plate extends beyond an edge of the door frame and engages with a retractable latch of the door latch mechanism. In such arrangements, a correspondingly shaped recess (e.g. a T-shaped or L-shaped recess) must be formed in the door frame to accommodate the face plate. It will be appreciated that the variability in the shape and dimensions of the face plate and opening, and the position of the opening relative to the periphery of the face plate, introduces a large number of variable dimensions that must be taken into account when forming a suitable recess in a door frame to accommodate the face plate, as well as forming an appropriate mortice recess. Jigs defining template apertures that are adjustable in at least one dimension, and preferably more than one dimension, are known. However, setup of such jigs is complicated and time consuming, especially where multiple dimensions must be adjusted. Additionally, when forming a recess for a door strike, it is also necessary to form a mortice recess, into which the retractable latch (or other locating member of the door mechanism) will extend, via the opening of the face plate, when the door is closed. However, the mortice recess must be accurately sized and positioned to correspond to the size and position of the opening of the face plate. This is a time consuming process. With the arrangement of the present invention, it is possible to adjust at least one dimension of the face plate aperture defined by the first templating device and at least one dimension of the mortice aperture defined by the second templating device independently of each other, according to the dimensions of the door strike to be installed. Once set, the first templating device can be secured to a door frame and the face plate recess formed in the door frame using the face plate aperture as a template for a cutting tool. The second templating device can then be attached to the first templating device and the mortice recess formed using the mortice aperture as a template for a cutting tool, with the mortice recess being located appropriately relative to the face plate aperture for the particular door strike to be installed. Both the face plate recess and the mortice recess can therefore be formed in a quick and simple procedure. Where multiple identical door strikes are being installed, the jig can be transferred to another door frame, without adjustment of the dimensions of the face plate aperture or mortice aperture, and used in the same way to form identical face plate and mortice recesses in the door frame. This can save significant amounts of time on the part of the user, which will be multiplied with an increasing number of door strikes being installed. Even where only one door strike is being installed, or multiple door strike having different shapes and sizes are being installed in the same job, the arrangement of the present invention simplifies the cutting operation by allowing the user to pre-set the dimensions of the face plate aperture and mortice aperture in advance, and subsequently form both the face plate recess and mortice recess in a quick and simple operation, with great accuracy. The second templating device may be removably attachable to the first templating device in a fixed position so as to allow the mortice aperture to overlie the plate aperture, in use. Accordingly, the second templating device can be attached to the first templating device with the mortice aperture directly overlying the face plate aperture. However, other conceivable embodiments may include a first templating device having a removable sub-body incorporating / defining the face plate aperture, the sub-body being removably attachable to the body element of the first templating device such that, when attached, the face plate aperture overlies the opening of the body element. The sub-body could be removed and the second templating device attached to the first templating device in the place of the sub-body, such that the mortice aperture does not overlie the face plate aperture (which has been removed entirely), however remains positioned relative to the position of the face plate aperture when the sub-body is installed in the first templating device, such that the mortice recess can be easily formed in the correct position. This enables the thickness dimension of the jig, when being used to form the mortice recess, to be minimised. The sub-body may comprise at least one template elements that are moveable relative to the sub-body to define a dimension or dimensions of the face plate aperture. It will also be appreciated from the following description that the second templating device may be removably attachable to the first templating device both when the sub-body is attached to the body element of the first templating device, such that the mortice aperture overlies the face plate aperture, and also when the sub-body has been removed, such that the mortice aperture overlies the opening of the body element of the first templating device but not the face plate aperture (which has been removed entirely). The allows the mortice aperture to overlie the face plate aperture during set-up, for easy adjustment of the at least one dimension of the mortice aperture, so as to provide the mortice aperture in appropriate dimensions and position relative to the face plate aperture. At the same time, the sub-body can be removed so as to allow the thickness dimension of the jig, when being used to form the mortice recess, to be minimised. The first templating device may comprise one or more recesses or holes formed in an outer surface of the first templating device, and the second templating device may comprise one or more corresponding protrusions arranged to be received with the one or more recesses or holes so as to locate the second templating device on the first templating device in the fixed position. This arrangement allows for a suitable attachment of the second templating device on the first templating device, without any protruding parts being required on the outer surface of the first templating device. This ensures that the attachment mechanism in no way obstructs the movement of a cutting tool, such as a router, across the outer surface of the first templating device, which may preferably be substantially planar. Each of the first templating device and the second templating device preferably defines a planar surface for movement of a flat base of a router across the planar surface. Preferably, the planar surface of the first templating device is located on at least two sides of the face plate aperture. This allows the flat base of a router to be supported on opposing sides of the face plate aperture when a routing operation is being performed using the face plate aperture as a template. Preferably, the planar surface of the second templating device is located on at least two sides of the mortice aperture. This allows the flat base of a router to be supported on opposing sides of the mortice aperture when a routing operation is being performed using the mortice aperture as a template. Preferably, at least one of the first templating device and the second templating device comprises: a first pair of template elements defining a first pair of opposing edges of the face plate aperture or the mortice aperture, at least one of the first pair of template elements being movable relative to the body element (of the respective one of the first or second templating devices) in a first direction to define a dimension of the face plate aperture or mortice aperture in the first direction, and and a second pair of template elements defining a second pair of opposing edges of the face plate aperture or the mortice aperture, at least one of the second pair of template elements being movable relative to the body element (of the respective one of the first or second templating devices) in a second direction to define a dimension of the face plate aperture or the mortice aperture in the second direction. Adjustment of the face plate aperture and / or mortice aperture in at least two directions is therefore possible. The first and second directions are preferably perpendicular to each other and most preferably represent vertical and horizontal directions of the apertures, in use. It will be appreciated that in some embodiments, one of the opposing edges of the face plate aperture and / or one of the opposing edges of the mortice aperture may not be moveable relative to the body element and may be formed by an edge of the body element itself, for example and edge of an opening formed in the body element. Each moveable template element may be a substantially plate-like member and the body element of the first templating device and the body element of the second templating device may each comprise one or more recesses arranged to accommodate one or more of the template elements. At least one of the template elements of the first templating device may comprise an edge arranged to overlap with the opening, which may be a substantially rectangular opening, to define a respective edge of the face plate aperture. Similarly, the body element of the second templating device may comprise an opening, which may be a substantially rectangular opening, wherein at least one of the template elements of the second templating device comprises an edge arranged to overlap with the opening to define a respective edge of the mortice aperture. Preferably, in one or both of the first templating device and the second templating device, one or more of the second pair of template elements overlies one or more of the first pair of template elements and is moveable relative to said one or more of the first pair of template elements in the second direction. Movement of the second pair of template elements can therefore be effected independently of the first pair of template elements. Preferably, in one or both of the first templating device and the second templating device, each of the second pair of template elements comprises a planar outer surface that is substantially flush with a planar outer surface of the body element, the outer surfaces of the second pair of template elements and the body element defining a planar outer surface of the first or second templating device. In some embodiments, the first templating device comprises: a first pair of template elements, each of the first pair of template elements being movable relative to the body element in a first direction to define a dimension of the face plate aperture in the first direction; and a second pair of template elements, each of the second pair of template elements being movable relative to the body element in the first direction to define a dimension of the face plate aperture in the first direction and being movable relative to the body element in a second direction, perpendicular to the first direction, to define a dimension of the face plate aperture in the second direction. This arrangement allows for adjustment of the face plate aperture to correspond to substantially any desired shape and configuration of a face plate of a door strike. The first pair of template elements can be adjusted in the first direction to define a longitudinal dimension of the face plate aperture, corresponding to the longitudinal dimension of the face plate. The second pair of template elements can be adjusted in the second direction to define a transverse dimension of the face plate aperture, corresponding to the transverse dimension of the face plate. At the same time, the second pair of template elements can also be adjusted in the first direction, to define a further longitudinal dimension of the face plate aperture, corresponding to the longitudinal 7 dimension of the tongue portion of the face plate. Thus, it will be appreciated that the face plate aperture is preferably configurable to define a T-shaped face plate aperture. The first templating device may comprise a locating member arranged to engage with a moveable template element of the first templating device so as to move with said template element, and to locate a door strike relative to the face plate aperture when the locating member is engaged with said movable template element, the locating member comprising at least one locating edge that is aligned with the face plate aperture and is spaced from an edge of the face plate aperture by a predetermined distance so as to, in use, define a spacing between an edge of the face plate aperture and an edge of said door strike. This enables at least one dimension of the face plate aperture to be set by direct reference to the door strike to be installed, by abutting an edge of the face plate against the locating edge of the locating member, and moving the template element accordingly. The spacing between the locating edge and the corresponding edge of the template element accounts for an offset between a guiding portion (e.g. a guide bush or bearing) and a cutting blade of a cutting tool (e.g. a rotating cutting blade of a router accommodated within the guide bush), as will be understood from the following description. Once the position of the movable template element has been set, removal of the locating member from the template element allows the edge of the template element to be used as a template for a cutting operation, without obstruction. Preferably, the first templating device comprises a plurality of template elements, each being movable relative to the body element to define a dimension of the face plate aperture, the first templating device further comprising a plurality of locating members, each locating member being arranged to engage with a respective one of the template elements so as to be moveable therewith, and to locate a door strike relative to the aperture, each locating member comprising at least one locating edge that is aligned with the face plate aperture and is spaced from a respective edge of the face plate aperture by a predetermined distance so as to, in use, define a spacing between an edge of the face plate aperture and an edge of said door strike. The position of each moveable template element, and the position of the edges of the face plate aperture defined by each moveable template element, can therefore be set by inserting the face plate of a door strike into the aperture, and moving the template elements such that each locating edge of the plurality of locating members abuts a corresponding edge of the door strike. Accordingly, the dimensions of the face plate aperture can be set by direct reference to the door strike to be installed, whilst accounting for any increase in the dimensions of the face plate aperture that is required by the particular cutting tool being used, as will be understood from the following description. Preferably, the or each locating member comprises a seat portion arranged to support a substantially planar surface of a door strike, in use, and a wall portion extending substantially perpendicularly to the seat portion to define a locating edge of the locating member. The seat portions provide a support for holding the door strike in place during setup, making adjustment of the dimensions of the face plate aperture and the position of the face plate aperture (relative to the body element) much easier for the user. Preferably, the first templating device comprises at least one locating member having a seat portion arranged to support a substantially planar surface of a door strike, in use, and two wall portions extending perpendicularly to the seat portion, the two wall portions defining an internal or external corner therebetween, each wall portion defining, in use, a locating edge of the locating member. Where an internal corner is provided, the locating member is able to accommodate an external corner portion of a face plate. Where an external corner is provided, the locating member is able to accommodate an internal corner portion of a face plate. Preferably, each locating member comprising a seat portion, wherein the seat portion of each locating member lies in a common plane that is parallel to a substantially planar outer surface of the first templating device. The face plate of the door strike can therefore be held by the locating members in a parallel arrangement relative to the outer surface of the first templating device, further facilitating correct setup of the face plate aperture. In some embodiments, the second templating device comprises: a body element; a first pair of template elements, each of the first pair of template elements being movable relative to the body element in the first direction to define the dimension of the mortice aperture in the first direction; and a second pair of the template elements, each of the second pair of template elements being movable relative to the body element in the second direction to define the dimension of the mortice aperture in the second direction. The dimensions of the mortice aperture and the position of the mortice aperture relative to the face plate aperture can be easily set. Preferably, the jig comprises a locating member that is removably attachable to the second templating device, the locating member defining at least one locating edge that is aligned with the mortice aperture and is spaced from an edge of the mortice aperture by a predetermined distance. The second templating device preferably comprises a plurality of locating members. In one embodiment, the jig comprises a plurality of locating members removably attachable to the second templating device, wherein said plurality of locating members defines, in use, a first pair of locating edges parallel to and spaced from respective edges of the first pair of template elements, and a second pair of locating edges parallel to and spaced from respective edges of the second pair of template elements. This arrangement allows the dimensions of the mortice aperture to be set by direct reference to a back box, dust box or face plate opening of a door strike. For example, the first pair of locating edges can locate the respective edges of the first pair of template elements relative to opposing edges / faces of a back box that extend in a first direction (e.g. opposing horizontal edges of the back box), and the second pair of locating edges locate the respective edges of the second pair of template elements relative to opposing edges / faces of the same back box that extend in a second direction orthogonal to the first direction (e.g. opposing vertical edges / faces of the back box). Thus, the dimensions of the mortice aperture can be easily and accurately set. Alternatively, the locating edges can be aligned with corresponding edges of the opening of the face plate to correctly locate the edges of the template elements relative to the edges of the opening. In some embodiments, said plurality of locating members that are removably attachable to the second templating device comprises a first locating member defining one of the first pair of locating edges and one of the second pair of locating edges, and a second locating member defining the other of the first pair of locating edges and the other of the second pair of locating edges. In some embodiments, each of said locating members that are attachable to the second templating device comprises a pair of perpendicular locating edges forming an internal corner for accommodating a corner portion of a back box of a door strike. In some embodiments, the body element of the first templating device has a substantially planar rear face for locating against a door frame, in use, the rear face of the body element having a lateral edge that is located on one side of the face plate aperture; and at least one spacer arranged to extend from the rear face in a direction perpendicular to the rear face, the or each spacer having a substantially planar rear face for locating against a door frame, in use, and having a lateral edge that is located on the same side of the face plate aperture, wherein, in use, the lateral edge of the spacer is located inboard of the lateral edge of the rear face of the body element. The at least one spacer is preferably locatable on the body element to extend from the rear face in a direction perpendicular to the rear face. With this arrangement, the spacer(s) can be used to accommodate a rebated doorframe. The planar rear face of the spacer is located against a face of the door frame in which the recess is to be formed, whilst the rear face of the body element is located against a face of a protruding portion of the rebated door frame. A secure attachment of the first templating device to a rebated door frame is achieved. The first templating device may comprise two spacers locatable on the body element so as to extend from the rear face, wherein one of the spacers is located on one side of the face plate aperture in a longitudinal direction of the face plate aperture and the other spacer is located on the other side of the aperture in the longitudinal direction. This provides a stable attachment of the first templating element to the rebated door frame. Preferably, a distance by which the or each spacer extends from the rear face body element, in a direction perpendicular to the rear face of the body element, is extendable. This allows the spacer to accommodate door frame of different rebate depths. Preferably, a dimension of the or each spacer in a direction perpendicular to the rear face of the body element is extendable, so as to extend the distance by which the spacer extends from the rear face of the body element. Each spacer may comprise a plurality of stackable spacer portions, allowing for extension of the dimension of the spacer. In some embodiments, the face plate aperture comprises a lateral edge extending in a longitudinal direction of the first templating device, and the lateral edge of the spacer lies in a longitudinal plane that encompasses the lateral edge of the face plate aperture or overlaps with the aperture. This allows the face plate aperture to be located as close as possible to the protruding portion of the rebated door frame, minimising the distance between the protruding portion of the rebated door frame and the face plate recess formed using the face plate aperture as a template. Preferably, the body element comprises one or more holes extending through the body element and the or each spacer comprises one or more corresponding holes extending through the spacer and arranged to be aligned with the one or more holes in the body element when the spacer is attached to the rear face of the body element, so as to permit a fastening member to extend through a respective one of the holes in the body element and a corresponding one of the holes in the spacer. For example, the fastening member may be a bradawl, screw or nail extending through a hole in the body element and a corresponding hole in the spacer, into the doorframe. This stabilises the attachment of the first templating device to the doorframe, where the spacer is used. In some embodiments, the body element of the first templating device has a substantially planar rear face for locating against a door frame, in use, and a stopper extending from the rear face of the body element in a direction perpendicular to the rear face of the body element, wherein a position of the stopper in a transverse direction is variable. The stopper can be used to ensure correct positioning of the face plate aperture in a transverse direction on the door frame recess. Preferably, the stopper is slidably attached to the body element within a track extending in the transverse direction. The transverse position of the stopper is thereby continuously adjustable within the track in the transverse direction. Preferably, a dimension of the stopper in a direction perpendicular to the rear face of the body element is extendable. This allows the dimension of the stopper to be adjusted, as necessary, where the first templating device is secured to a rebated door frame. However, where the first templating device is being used on a door frame without a rebate, the dimensions of the stopper can be minimised. In other words, the dimensions of the stopper can be made no larger than necessary for any particular application. Preferably, the stopper comprises a plurality of stackable stopper portions. Preferably, the stopper comprises a first stopper portion arranged to attach to the body element, and a second stopper portion arranged to attach to the first stopper portion so as to extend the dimension of the stopper in a direction perpendicular to the rear face of the body element. The stopper may additionally comprise a third stopper portion arranged to attach to the second stopper portion, so as to further extend the dimension of the stopper in a direction perpendicular to the ear face of the body element. Preferably, a dimension of the first stopper portion in a direction perpendicular to the rear face of the body element is smaller than a dimension of the second stopper portion in the same direction. Preferably, the dimensions of the second and third stopper portions in a direction perpendicular to the rear face of the body element are equal. In some embodiments, where the first templating device comprises a spacer as described above, a maximum dimension of the stopper in a direction perpendicular to the rear face of the body element is greater than a maximum dimension of the or each spacer in a direction perpendicular to the rear face of the body element. This allows the stopper to extend beyond the face of the door frame in which the recess is to be formed (and against which the spacer is located), so as to engage a perpendicular face of the door frame and restrict transverse movement of the first templating device across said face of the door frame in which the recess is to be formed. The stopper may comprise a first stopper portion arranged to attach to the body element, and a second stopper portion arranged to attach to the first stopper portion so as to extend the dimension of the stopper in a direction perpendicular to the rear face of the body element, wherein the or each spacer comprises at least a first spacer portion arranged to attach to the rear face of the body element, and wherein, in use, when: the second stopper portion is attached to the first stopper portion; the first stopper portion is attached to the body element; and the first spacer portion is attached to the rear face of the body element, the dimension of the stopper in a direction perpendicular to the rear face of the body element is greater than the dimension of the spacer in the same direction. This allows the dimension of the stopper to be extended when a spacer is used, such that the stopper can extend further than the spacer, allowing the stopper to extend beyond the face of the door frame in which the recess is to be formed (and against which the spacer is located), so as to engage a perpendicular face of the door frame and restrict transverse movement of the first templating device. Still further, the stopper may comprise a third stopper portion arranged to attach to the second stopper portion so as to extend the dimension of the stopper in a direction perpendicular to the rear face of the body element, wherein the spacer comprises a second spacer portion arranged to attach to the first spacer portion so as to extend the dimension of the spacer in a direction perpendicular to the rear face of the body element, and wherein, in use, when: the second and third stopper portions are attached to the first stopper portion the first stopper portion is attached to the body element; the second spacer portion is attached to the first spacer portion; and the first spacer portion is attached to the rear face of the body element the dimension of the stopper in a direction perpendicular to the rear face of the body element is greater than the dimension of the first spacer portion in the same direction. With this arrangement, the dimensions of both the spacer and the stopper can be extended incrementally, according to the particular application, whilst ensuring that the stopper extends further than the spacer to allow for engagement with a face of the door frame perpendicular to the face in which the recess is to be formed. According to a second aspect of the present invention, there is provided a method of forming a recess in a door frame for accommodating a door strike, the method comprising: providing a jig in accordance with the first aspect; adjusting at least one dimension of the face plate aperture in dependence on a corresponding dimension of a face plate of the door strike to be installed; adjusting at least one dimension of the mortice aperture in dependence on a corresponding dimension of an opening of the face plate of the door strike to be installed; securing the first templating device to a door frame; forming a face plate recess in the door frame using the face plate aperture of the first templating device as a template for a cutting tool; locating the second templating device on the first templating device; and forming a mortice recess in the doorframe using the mortice aperture of the second templating device as a template for a cutting tool. In some embodiments, wherein the recess is a first recess formed in a first door frame, the method further comprises: removing the first and second templating devices from the first door frame after formation of the face plate recess and mortice recess; securing the first templating device to a second door frame, separate to the first door frame, without further adjustment of the dimension of the face plate aperture; forming a face plate recess in the second door frame using the face plate aperture of the first templating device as a template for a cutting tool; locating the second templating device on the first templating device, without further adjustment of the dimension of the mortice aperture; and forming a mortice recess in the second door frame using the mortice aperture of the second templating device as a template for a cutting tool. According to a third aspect of the present invention, there is provided a templating device for use in forming a recess or opening in a door frame or other substrate for accommodating a piece of hardware, the templating device comprising an aperture defining a template for forming a recess for a piece of hardware, wherein at least one dimension of the aperture is adjustable; a body element; a template element that is movable relative to the body element so as to define a dimension of the aperture; and a locating member arranged to engage with the template element so as to be movable with the template element, and to locate a piece of hardware relative to the aperture when the locating member is engaged with the template element, the locating member comprising at least one locating edge that is aligned with the aperture and is spaced from an edge of the aperture by a predetermined distance so as to, in use, define a spacing between an edge of the aperture and an edge of said piece of hardware. The advantages of the third aspect of the present invention will be apparent from the description of the locating members of the first aspect of the invention described above. For any jig or templating device comprising a moveable template element defining at least one dimension of the aperture, the provision of a locating member allows the position of the moveable template element to be set by direct reference to a piece of hardware that is to be accommodated by the recess formed using the aperture as a template. The locating member may be removable from the template elements to allow the cutting operation to be performed, or may remain attached to the template element but moveable away from the edges of the aperture so as to not obstruct a cutting operation performed using the aperture as a template. Cutting tools typically comprise an offset between an edge of a cutting blade and a guiding portion of the cutting tool, typically of the order of a few millimetres. For example, a router will generally comprise a rotating cutting blade that is housed within a substantially cylindrical guide bush. An edge of the cutting blade is thus set back from the guide bush. In use, the guide bush is passed along an edge of the aperture / template, meaning that the cut formed in the material is offset from the edge of the aperture / template by a distance corresponding to the offset between the guide bush and the edge of the cutting blade. Therefore, if the dimensions of the aperture were to be identical to the dimensions of the hardware to be installed, the recess formed would be smaller than the particular piece of hardware. Accordingly, provision of the locating members having a locating edge that is spaced from the edge of the template element allow the position of the moveable template element to be set, with the dimension of the aperture being larger than the corresponding dimension of the piece of hardware. The recess formed has dimensions matching the dimensions of the hardware. Alternatively, a cutting blade of the router may comprise a bearing, which is similarly used to guide the cutting blade along a surface of a template, wherein a guiding surface of said bearing is similarly offset from the cutting edge of the cutting blade. Thus, the provision of locating members is equally beneficial in such cases. In this regard, it will be appreciated that the distance by which the locating edge is spaced from the edge of the template element will be dependent on the particular cutting tool being used, and in particular the distance between the cutting edge of the cutting tool and the guiding portion thereof. A particular locating member will therefore be associated with a particular cutting tool arrangement. It will also be appreciated that the third aspect of the present invention may be beneficial for a range of types of hardware and is not limited to installation of a door strike in a door frame. The third aspect may be used for installation of a variety of pieces of hardware in a variety of substrates in which a recess or opening may be formed. Preferably, the templating device comprises a plurality of template elements, each being movable relative to the body element to define a dimension of the aperture, the jig further comprising a plurality of locating members, each locating member being arranged to engage with a respective one of the template elements so as to be moveable therewith, and to locate a piece of hardware relative to the aperture, each locating member comprising at least one locating edge that is aligned with the face plate aperture and is spaced from a respective edge of the face plate aperture by a predetermined distance so as to, in use, define a spacing between an edge of the aperture and an edge of said piece of hardware. Preferably, the or each locating member comprises a seat portion and a wall portion extending substantially perpendicularly to the seat portion to define a locating edge of the locating member. The seat portions provide a support for holding the hardware in place during setup, making adjustment of the dimensions of the aperture and the position of the aperture (relative to the body element) much easier for the user. The templating device may comprise at least one locating member having a seat portion and two wall portions extending perpendicularly to the seat portion, the two wall portions defining an internal corner therebetween, each wall portion defining, in use, a locating edge of the locating member. The locating member is therefore suitable for accommodating an external corner portion of a piece of hardware to be installed. The templating device may comprise at least one locating member having a seat portion and two wall portions extending perpendicularly to the seat portion, the two wall portions defining an external corner therebetween, each wall portion defining, in use, a locating edge of the locating member. The locating member is therefore suitable for accommodating an internal corner portion of a piece of hardware to be installed. The templating device may comprise a plurality of locating members, each locating member comprising a seat portion, wherein the seat portion of each locating member lies in a common plane that is parallel to a substantially planar outer surface of the templating device. The templating device may comprise a first pair of template elements, each one of the first pair of template elements being movable relative to the body element in a first direction to define a dimension of the face plate aperture in the first direction. With such arrangements it is preferable that the templating device comprises a first pair of locating members, each of the first pair of locating members being arranged to engage with a respective one of the first pair of template elements to move therewith and having a seat portion and two wall portions extending perpendicularly to the seat portion, the two wall portions defining an internal corner therebetween, each wall portion defining, in use, a locating edge of the locating member, wherein one of the locating edges is parallel to and spaced from an edge of the template element defining an edge of the aperture and the other of the locating edges is parallel to and spaced from an adjacent edge of the aperture. Each locating member is preferably removably attachable to a respective one of the first pair of templating elements. The templating device may comprise a second pair of template elements, each one of the second pair of template elements being movable relative to the body element in the first direction to define a dimension of the face plate aperture in the first direction and in a second direction, perpendicular to the first direction, to define a dimension of the face plate aperture in the second direction. With such arrangements, it is preferable that the templating device comprises a second pair of locating members, each of the second pair of locating members being arranged to engage with a respective one of the first pair of template elements to move therewith and having a seat portion and two wall portions extending perpendicularly to the seat portion, the two wall portions defining an external corner therebetween, each wall portion defining, in use, a locating edge of the locating member, wherein each of said locating edges is parallel to and spaced from a respective edge of the template element with which the locating member is engaged. Each locating member is preferably removably attachable to a respective one of the second pair of templating elements. According to a fourth aspect of the present invention, there is provided a method of forming a recess in a door frame or other substructure for accommodating a piece of hardware, the method comprising: providing a templating device in accordance with the third aspect; engaging the locating member with the template element; abutting an edge of a piece of hardware against the locating edge of the locating member; adjusting at least one dimension of the aperture in dependence on a corresponding dimension of the piece of hardware by moving the template element relative to the body element; securing the templating device to a door frame or other substructure; and forming a recess in the door frame using the face plate aperture of the first templating device as a template for a cutting tool. Non-limiting embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings in which: Figure 1A is an exploded front perspective view of a jig; Figure 1B is a collapsed perspective view of the jig of Figure 1A; Figure 1C is a rear perspective view of a second templating device of the jig of Figure 1A; Figures 2A to 2D are plan views of a first templating device of the jig of Figure 1 A; Figures 3A and 3B are perspective views of the first templating device; Figures 4A and 4B are enlarged perspective views of locating member of the first templating device; Figure 5 is a perspective view of the first templating device located on a door frame; Figures 6Ato 6D are plan views of the jig of Figure 1A, showing the second templating device; Figure 7 is an exploded rear perspective view of the first templating device; and Figures 8Ato 8C are rear perspective views of the first templating device mounted to door frames having varying rebate depths; and Figures 9A to 11C are perspective views of a jig in accordance with a further embodiment of the present invention. Jig With reference to Figures 1A and 1B, there is shown a jig 1 in accordance with the present invention, for use in forming a recess in a door frame for accommodating a door strike. The jig 1 has a longitudinal direction L corresponding to a vertical direction during normal use of the jig 1, and a transverse direction T orthogonal to the longitudinal direction L and corresponding to a horizontal direction during normal use of the jig 1. Figure 1A shows a typical door strike 10 for which the present invention may be used. The door strike 10 comprises a face plate 12 having a tongue 14, which, when installed, extends beyond an edge of the door frame. An opening (not visible) is provided in the face plate 12 adjacent the tongue 14. In use, a sprung door latch engages with the tongue and retracts as the door is being closed. The latch then moves along the tongue and is released when it reaches the opening to extend through the opening, so as to secure the door in the closed position until the latch is again retracted, for example by operating a door handle. In the illustrated embodiment, the door strike 10 comprises a back box 16 (or dust box) on a rear surface of the face plate 12, into which a door latch will extend via the opening of the face plate 14. It will be appreciated that in other arrangements, the back box may not be present and / or may be provided as a separate component that is attachable to the face plate. The jig 1 comprises a first templating device 100 and a second templating device 200. The first templating device 100 comprises a face plate aperture 102, which is used as a template to form a recess in a door frame for accommodating a face plate of a door strike. The first templating device 100 comprises a plurality of moveable template elements 104, 106, which can be used to adjust the shape and dimensions of the face plate aperture 102, as will be explained in further detail below. The second templating device 200 comprises a mortice aperture 202, which is used as a template for forming a mortice recess in a doorframe. In use, the mortice recess may accommodate the back box of a door strike. However, where the door strike does not comprise a back box, a mortice recess is still required to receive the sprung latch of the door via the opening of the face plate. Therefore, for any given door strike, a mortice recess is required in the door frame. The second templating device 200 comprises a plurality of moveable template elements 204, 206, which can be used to adjust the dimensions of the mortice aperture 202, as will be explained in further detail below. The second templating device 200 is removably attachable to the first templating device 100 in a predetermined position, so as to allow the mortice aperture 202 of the second templating device 200 to overlie the face plate aperture 102 of the first templating device 100. Accordingly, in use, the first templating device 100 can be set up to provide a face plate aperture 102 having the desired dimensions. The second templating device 200 is also set up to provide a mortice aperture 202 having the desired dimensions and, importantly, in the desired position relative to the face plate aperture 102, corresponding to the position of the opening in the face plate of the door strike to be installed. Since the second templating device 200 is attached to the first templating device 100 in a fixed, predetermined position, the mortice aperture 202 can be appropriately aligned with the face plate aperture 102 during set up of the jig 1. In use, the first templating device 100 is secured to a door frame. A face plate recess is then formed in the door frame with an appropriate cutting tool, such as a handheld router, using the face plate aperture 102 as a template for the cutting tool. Without removing the first templating device 100 from the door frame, the second templating device 200 is attached to the first templating device 100 in the predetermined position, with the mortice aperture 202 appropriately aligned with (overlying) the face plate aperture 102. A mortice recess can then be formed in the door frame, using the mortice aperture 202 as a template for the cutting tool. The mortice recess is therefore easily formed in the correct position, relative to the face plate recess, since the first templating device 100 used for forming the face plate recess is not moved from its original position, and acts as a reference point for the second templating device 200 used to form the mortice recess. User error in the correct positioning of the jig for forming a mortice recess is thereby eliminated. This is particularly advantageous where a large number of identical door strikes are to be installed quick succession, such as in a new build property. The first and second templating devices 100, 200 need only be set up once according to the dimensions of the door strikes to be installed, and can then be quickly and easily transferred between different door frames without needing to reset the dimensions of the face plate aperture or mortice aperture or the position of the mortice aperture relative to the face plate aperture. It will be appreciated that use of the face plate aperture 102 and mortice aperture 202 as a template for a cutting tool encompasses any arrangement in which a part of a cutting tool is guided along the edges of the aperture to form a recess having a shape corresponding to that of the aperture. In a particular example, the cutting tool may be a router, or more particularly a handheld router, which may comprise a rotating cutting blade surrounded by a guide bush. In this example, the guide bush will be guided along the edges of the aperture whilst the cut is being formed. Thus, it will be appreciated that in many circumstances, the cutting blade itself is not guided along the edge of the aperture. Such arrangements create an offset between the edge of the aperture used as a template and corresponding edges of the recess being formed. Use of the jig 1 in such scenarios is discussed in detail below. It will also be appreciated that the depth of the mortice recess must be greater than the depth of the face plate recess. The cutting tool must therefore be appropriately set up so that its blade extends to the desired depth, accounting also for the increased depth of the jig 1 resulting from layering of the second templating device 200 on the first templating device 100. Referring again to Figure 1A, the first templating device 100 comprises a body element 110 having substantially planar outer surface, which acts as a supporting surface for a base of a cutting tool (such as a router). The base of the cutting tool can be moved across the supporting surface, with the cutting blade extending through the face plate aperture to cut the face plate recess. A plurality of recesses 112 are formed in the outer surface of the first templating device 100. Corresponding protrusions 212 are provided on a rear surface of the second templating device 200 (Figure 1C), which are arranged to be received within the recesses 112 so as to locate the second templating device 200 on the first templating device 100 in the predetermined position. With this arrangement, the second templating device 200 is always located on the first templating device 100 in the same, fixed position, meaning that once the respective template apertures 102, 202 of the first and second templating devices 100, 200 are set up correctly, the template apertures 102, 202 will be appropriately aligned when the second templating device 200 is located on the first templating device 100. Movement of the second templating device 200 relative to the first templating device 100 is not possible, ensuring the correct alignment of apertures 102, 202 is maintained. Moreover, by providing recesses 112 on the outer surface of the first templating device 100 as the means for engaging with the second templating device 200, the outer surface of the firs templating device 100 does not comprise any protrusions which may obstruct the movement of a cutting tool across the outer surface. First Templating Device The first templating device 100 will now be described in more detail with reference to Figures 2A to 2D. The first templating device 100 comprises a body element 110 defining, in part, the planar outer surface of the first templating device 100. The body element 110 comprises an opening 114 extending through the body element 110 from the outer surface to a rear surface of the first templating device 100. The first templating device 100 further comprises a first pair of template elements 104 having opposing edges 116a, 116b that extend in the transverse direction T and overlap the opening 114 to define a pair of opposing transverse edges of the face place aperture 102 that are separated in the longitudinal direction L. Each of the first pair of template elements 104 is movable in the longitudinal direction L to define a dimension A of the face plate aperture 102 between the two opposing transverse edges 116a, 116b. This is shown in Figures 2A and 2B. In Figure 2A, the first pair of template elements 104 define a distance A1 between the transverse edges 116a, 116b and in Figure 2B, the first pair of template elements 104 are moved closer together in the longitudinal direction L to define a distance A2 between transverse edges 116a, 116b of the face plate aperture 102, distance A2 being smaller than distance A1. In this manner, the dimension A between the opposing transverse edges 116a, 116b can be adjusted in dependence on the corresponding dimension of the face plate to be installed. In this regard, it will be appreciated that dimension A is determined by a vertical dimension of the face plate (that is, a dimension of the face plate that extends in a vertical direction in a normal installation of the door strike), plus any necessary offset required, as will be described in greater detail below. The first templating device 100 further comprises a second pair of template elements 106. Each of the second pair of template elements 106 is moveable in the longitudinal direction L and in the transverse direction T. Opposing transverse edges 118a, 118b of the second pair of template elements 106 extend in the transverse direction T and define a dimension B of the face plate aperture 102 in longitudinal direction. Each of the opposing transverse edges 118a, 118b extends parallel to the transverse edges 116a, 116b of the first pair of template elements 104. Each template element 106 of the second pair also comprises a longitudinal edge 120a, 120b adjacent and perpendicular to the transverse edge 118a, 118b thereof, which longitudinal edge 120a, 120b opposes a longitudinally-extending lateral edge 122a of the opening 114 in the body element 110, to define a dimension C of the face plate aperture 102 in the transverse direction T. As can be seen from Figures 2A and 2B, the shape and dimensions of the face place aperture 102 can be defined by movement of the first and second pairs of template elements 104, 106. In Figure 2A, a rectangular aperture is defined between the two opposing transverse edges 116a, 116b of the first pair of template elements and two opposing longitudinally extending lateral edges 122a, 122b of the opening 114 of the body element 110. In Figure 2B, a substantially T-shaped aperture is defined between the opposing lateral edges 122a, 122b of the opening 114 of the body element 110, the opposing transverse edges 116a, 116b of the first pair of template elements 104, the opposing transverse edges 118a, 118b of the second pair of template elements 106, and the longitudinal edges 120a, 120b of the second pair of template elements 106. In this regard, it will be understood that in the configuration shown in Figure 2B, the face place aperture 102 comprises two, distinct dimensions A and B in the longitudinal direction L. A first longitudinal dimension A is defined between the opposing transverse edges 116a, 116b of the first pair of template elements 104. A second longitudinal dimension B is defined between the opposing transverse edges 118a, 118b of the second pair of template elements 106. A portion of the T-shaped face plate aperture 102 defined between the opposing transverse edges 118a, 118b of the second pair of template elements 106 is suitable to accommodate the tongue portion 14 of the face plate 12 (shown for example in Figure 1A) and thus dimension B is set to according to the dimension of the tongue portion 14 of the face plate 12 in the longitudinal direction, allowing for any necessary offset to account for an offset between the cutting blade and a guiding surface of the cutting tool, as explained below. Each of the template elements 104, 106 is in the form of a substantially plate-like member, although other configurations are possible. In order to permit the necessary movement of the template elements 104, 106, the body element 110 comprises a first recess 124 arranged to accommodate the first pair of template elements 104, and a second recess 126 arranged to accommodate the second pair of template elements 106. A depth of the first recess 124 from the outer face of the body element 110 is greater than a depth of the second recess 126 from the outer face of the body element 110. A thickness of each of the first pair of template elements 104 is less than or equal to a difference between the depths of the first and second recesses 124, 126, such that when the first pair of template elements 104 are accommodated within the first recess 124, they do not protrude above a basal surface of the second recess 126. Accordingly, when the second pair of template elements 106 are accommodated within the second recess 126, the second pair of template elements 106 are permitted move over the first pair of template elements 104, as shown in Figure 2B, for example. It will be appreciated that alternative arrangements in which relative movement of the first and second pairs of template elements 104, 106 is permitted without hindrance are possible. For example, the depths of the first and second recesses 124, 126 could be reversed, such that the first pair of template elements 104 sit above the second pair of template elements 106 to move over the second pair of template elements 106 without hindrance. Each of the second pair of template elements 106 comprises a substantially planar outer surface that is arranged to lie substantially flush with the substantially planar outer surface of the body element 110. Accordingly, these surfaces define between them a planar outer surface of the first templating device 100 for supporting a cutting tool (such as a router) during a routing operation. Since the first pair of template elements 104 lie beneath the second pair of template elements 106 (in a depth direction) the first pair of template elements 104 do not protrude above the planar outer surface of the first templating device 100 and therefore do not hinder movement of a cutting tool across the planar outer surface. The mechanism by which the template elements 104, 106 are moveably attached to the body element 110 is not particularly critical, provided movement of the template elements 104, 106 and the cutting tool is not hindered. In the illustrated embodiment, each of the template elements 104, 106 comprises one or more elongate grooves 128 extending in the longitudinal direction, each groove 128 being arranged to receive fasteners 130 (for example screws) that extend through the grooves 128 and engage with the body element 110. For the first pair of template elements 104, the fasteners 130 are arranged to engage with the body element 110 in a fixed position (said fixed position being in the first recess 124 of the body element 126). When the fasteners 130 are loosened, sliding movement of each of the first pair of template elements 104 in the longitudinal direction L relative to the fasteners 130 is permitted by means of the elongate groove 128. When positioned appropriately, each of the first pair of template elements 104 is secured in position by tightening the fasteners 130. Similarly, each of the second pair of template elements 106 comprises two elongate groves 128 permitting movement of the template elements 106 relative to the fasteners 130 in the longitudinal direction L. Additionally, each of the fasteners extends through elongate grooves 132 formed in the second recess 126 of the body element 110, the elongate grooves 132 extending in the transverse direction T (perpendicular to the longitudinal direction L). The fasteners 130 extend through the grooves 132 and into a back plate 134 located at the rear face of the body element 110 (shown in Figure 7). When the fasteners 130 are loosened, the template elements 106 are slidable in the transverse direction T together with the fasteners 130 and the back plate 134. When in the desired position, tightening the fasteners 130 sandwiches the body element 110 between the template element 106 and the back plate 134 so as to prevent movement of the template element 106 in the transverse direction T. Accordingly, each of the second pair of template elements 106 is moveable relative to the body element in both the longitudinal direction L and the transverse direction T. Referring now to Figures 2C, 2D, 3A, 3B, 4A and 4B, in particular, the first templating device 100 further comprises a plurality of locating members 136,138, each locating member 136, 138 being arranged to engage with a respective one of the template elements 104, 106 so as to be moveable therewith. That is to say, when a locating member 136,138 is engaged with a respective one of the template elements 104, 106, movement of the template element 104, 106 effects a concurrent movement of the locating member 136, 138. Each locating member 136, 138 is arranged to at least partially locate a door strike 10 relative to the face place aperture 102. Each locating member 136, 138 comprises locating edges 136a, 138a that are aligned with the face plate aperture 102 (that is to say, the locating edges overlap with the face plate aperture 102 when viewed in a direction perpendicular to the outer face of the first templating device 100) and that are spaced from a respective edge of the face plate aperture 102 by a predetermined distance. The predetermined distance by which each of the locating edges 136a, 138a of the plurality of locating members 136, 138 is spaced from a respective edge of the face plate aperture 102 is the same. Therefore, as will be appreciated from the following description, when respective edges of the face plate 12 of a door strike 10 are abutted against corresponding locating edges 136a, 138a of the locating members 136, 138, a constant spacing is provided between the edges of the face plate 12 and the edges of the face plate aperture 102. This accounts for an offset between the cutting blade of a cutting tool (such as a router) and a guiding surface of the cutting tool that is passed along the respective edges of the aperture. For instance, a cutting blade of a router is typically housed within a substantially cylindrical guide bush. The outer surface of the guide bush is guided along the edges of the aperture to guide the router blade within the aperture The outer surface of the guide bush therefore defines a guiding surface. A separation between the cutting edge of the router blade and the outer surface of the guide bush is typically of the order of a few millimetres, depending on the guide bush to cutting blade diameter ratio. This means that the dimensions of face plate aperture 102 must be increased in all directions, such that the dimensions of the recess formed using the router correspond to the dimensions of the face plate. For example, where a separation between the outer surface of the guide bush and the cutting edge of the router blade is 2mm, each of the locating edges of the locating members would be spaced from a corresponding edge of the face plate aperture by 2mm. Each locating member 136, 138 comprises a seat portion 136b, 138b that is arranged to support the planar outer face of the door strike 10 to be installed, and two wall portions that extend perpendicularly to the seat portion to define locating edges 136a, 136b of the locating member 136, 138. As shown in Figure 2D, in particular, the face plate 12 can be seated on the respective seat portions 136b, 138b of the locating members 136, 138 and the edges of the face plate 12 are abutted against the wall portions to space the face plate 12 from the edges of the face plate aperture 102 by the appropriate distance. With the fasteners 130 loosened, the position of the template elements 104, 106 can be adjusted as necessary to locate the face plate 12 as described, depending on the particular dimensions of the door strike 10 to be installed. The entire assembly can then be moved in the longitudinal direction L to position the face plate aperture 102 as desired. Once set up, the fasteners 130 can be tightened to secure the template elements 104, 106 in position, and the door strike 10 and locating members 136, 138 can be removed, providing a face plate aperture 102 of the exact dimensions required for forming a recess to accommodate the face plate 12 of the door strike 10. With this arrangement, the door strike 10 itself can be used as a reference to set the dimensions of the face plate aperture 102. Setup does not therefore require complicated transfer of measurements from the door strike 10 to the first templating device 100. By seating the face plate 12 of the door strike 10 on the seat portions 136b, 138b, adjustments to the positions of the template elements 104, 106 can be easily made without the need for the user to simultaneously hold the face plate 12 within the face plate aperture 102. Provision of the locating edges 136a, 136b provides the necessary offset of the edges of the face plate aperture 102, without the need for the user to make manual adjustments. Set up of the first templating device 100 can therefore be achieved in a straightforward manner. The locating members 136, 138, in particular the seat portions 136b, 138b thereof, may be magnetised to assist in holding the door strike 10 (commonly formed of a magnetic material) in place. A first pair of locating members 136 are arranged to engage with the first pair of template elements 104. Each locating member 136 of the first pair comprises a seat portion 136b and two wall portions extending perpendicularly to the seat portion 136b, the two wall portions defining an internal corner therebetween. These locating members 136 are therefore suitable to receive an 25 external corner portion of the face plate 12, as shown in Figure 2D. In the majority of cases, the two wall portions will be arranged at right angles to each other. A second pair of locating members 138 are arranged to engage with the second pair of template elements 106. Each locating member 138 of the second pair comprises a seat portion 138b and two wall portions extending perpendicularly to the seat portion 138b, the two wall portions defining an external corner therebetween. These locating members are therefore suitable to receive an internal corner portion of the face plate 12, as shown in Figure 2D. In the majority of cases, the two wall portions will be arranged at right angles to each other. The seat portion 136b, 138b of each of the locating members 136, 138 lies in a common plane that is parallel to the planar outer surface of the first templating device 100. The locating members 136, 138 therefore support the face plate 12 of the door strike 10 in a parallel alignment with the outer surface of the template element 100. As shown most clearly in Figures 3A, 4A and 4B, each locating member 136, 138 comprises a protrusion 140 arranged to be received within a recess 142 formed in one the of template elements 104, 106, so as to engage the locating member 136, 138 with the template element 104,106 to move therewith. However, other arrangements are conceivable. Figure 5 illustrates the use of the first templating device 100 for forming a face plate recess in a door frame 20. Once the first templating device 100 is set up appropriately for the particular door strike to be installed, as described above, the first templating device 100 is offered up to the door frame 20 in the correct vertical position for engaging with the latch of a door hung within the door frame. In this regard, normally the door will be hung within the door frame and the latch installed in the door first, such that the correct vertical position of the face plate recess can be derived directly from the door latch. The vertical position of the face plate could alternatively be derived by careful measurement. The first templating device 100 must also be accurately positioned horizontally (that is, in a transverse direction of the face of the doorframe), such that the opening of the face plate is correctly positioned to allow the door latch to be received through the opening of the face plate and in the mortice recess, without rattling back and forth. It will be appreciated that the correct horizontal position of the face plate recess must therefore be derived from the position of the sprung latch in the side edge of the door. A particularly suitable means for ensuring correct horizontal positioning in accordance with the present disclosure will be described below. The first templating device 100 is secured to the door frame 20 by suitable fastening means 144, in the illustrated embodiment taking the form of a pair of bradawls arranged to extend through holes 148 in the body element 110 and into the door frame 20. A plurality of holes 148 is provided in the body element 110, which holes 148 are displaced in the transverse direction T. This allows the user to fasten the first templating device 100 in an appropriate position using an appropriate one of the holes 148, depending on the dimensions of the door frame and the desired position of the first templating device 100 on the door frame. Other fastening means, such as screws, could conceivably be used. With the first templating device 100 secured to the door frame 20 in the appropriate position, as shown in Figure 5, the face plate recess can be formed in the door frame by passing a router (or other appropriate cutting tool) around the face plate aperture 102. Whilst Figure 4 illustrates the first templating device 100 with the locating members 136, 138 still in place, it will be appreciated that these will be removed before any routing or cutting operation takes place. Second Templating Device The second templating device 200 will now be described in more detail with reference to Figures 6A to 6D. The second templating device 200 comprises a body element 210 defining, in part, the planar outer surface of the second templating device 200. The body element 210 comprises an opening 214 extending through the body element 210 from the outer surface to a rear surface of the second templating device 200. The second templating device 200 further comprises a first pair of template elements 204 having opposing edges 216a, 216b that extend in the transverse direction and overlap the opening 214 to define a pair of opposing transverse edges of the mortice aperture 202, that are separated in the longitudinal direction. Each of the first pair of template elements 204 is movable in a longitudinal direction L to define a dimension D of the mortice aperture between the two opposing transverse edges 216a, 216b. This is shown in Figures 6A and 6B. In Figure 6A, the first pair of template elements 204 define a distance D1 between the transverse edges 216a, 216b and in Figure 6B, the first pair of template elements 204 are moved closer together in the longitudinal direction L to define a distance D2 between transverse edges 216a, 216b of the mortice aperture 202, distance D2 being smaller than distance D1. In this manner, the dimension D of the mortice aperture 202 can be adjusted according to the corresponding dimension of the mortice to be formed. In this regard, it will be appreciated that dimension D corresponds to a vertical dimension of the mortice (that is, a 27 dimension of the mortice that extends in a vertical direction in a normal installation of the door strike), plus any necessary offset required. The second templating device 200 further comprises a second pair of template elements 206 having opposing edges 220a, 220b that extend in the longitudinal direction L and overlap the opening 214 to define a pair of opposing longitudinal edges of the mortice aperture 202 that are separated in the transverse direction T. Each of the second pair of template elements 206 is movable in the transverse direction T to define a dimension E of the mortice aperture 202 between the two opposing longitudinal edges 220a, 220b. This is shown in Figures 6A and 5B. In Figure 6A, the second pair of template elements 206 define a distance E1 between the longitudinal edges 220a, 220b and in Figure 6B, the second pair of template elements 206 are moved closer together in the transverse direction T to define a distance E2 between longitudinal edges 220a, 220b of the mortice aperture 202, distance E2 being smaller than distance E1. In this manner, the dimension E of the mortice aperture 202 can be adjusted according to the corresponding dimension of the mortice to be formed. In this regard, it will be appreciated that dimension E corresponds to a horizontal dimension of the mortice (that is, a dimension of the mortice that extends in a horizontal direction in a normal installation of the door strike), plus any necessary offset required. Each of the template elements 204, 206 of the second templating device 200 is in the form of a substantially plate-like member, although other configurations are possible. The plate-like elements are received within recesses formed in the body element and are moveably fastened within said recesses in substantially the same manner as described above in relation to the template elements of the first templating device. Each of the template elements 204, 206 comprises an elongate groove 228 extending in the longitudinal direction or transverse direction, each groove being arranged to receive fasteners 230 (e.g. screws) that extend through the grooves 228 and engage with the body element 210. This arrangement allows slidable attachment of the template elements 204, 206 to the body element 210, permitting movement of the template elements 204, 206 in either the longitudinal direction L or transverse direction T, in the same manner as described above in relation to the first templating device 100. Alternative attachment mechanisms are possible. Each of the second pair of template elements 204, 206 comprises a substantially planar outer surface that is arranged to lie substantially flush with the substantially planar outer surface of the body element 210. Accordingly, these surfaces define between them a planar outer surface of the second templating device 200 for supporting a cutting tool (such as a router) during a routing operation. Since the first pair of template elements 204 lie beneath the second pair of template elements 206 (in a depth direction) the first pair of template elements 204 do not protrude above the planar outer surface of the second templating device 200 and therefore do not hinder movement of a cutting tool across the planar outer surface. Referring now to Figures 1 A, 1B, 6C and 6D. the second templating device 200 further comprises a pair of locating members 236, each locating member 236 being removably attachable to the second templating device 200 and defining at least one locating edge 236a that is aligned with the mortice aperture 202 (i.e. overlaps with the mortice aperture 202 when viewed in a direction perpendicular to the outer face of the second templating device 200). When attached, each locating edge 236a is spaced from an edge of the mortice aperture 202 by the same predetermined distance. In the illustrated embodiment, each locating member comprises two locating edges 236 that lie perpendicular to each other and form an internal corner, suitable for receiving an external corner portion of a door strike back box 16. Each locating edge 236a lies parallel to and is spaced from a respective one of the edges of the mortice aperture 202, defined by the template elements 204, 206, by the predetermined distance. This provides an appropriate offset of the mortice aperture 202 to ensure that the mortice recess formed using the second templating device 200 is appropriately dimensioned for the particular door strike being installed, accounting for any necessary offset between the edges of the mortice aperture 202 and the cutting blade, as described above. The locating members 236 may be attached to the second templating device 200 by any appropriate means, provided that the locating edges 236a thereof are appropriately positioned relative to the edges of the template elements 204, 206. In the illustrated embodiment, each locating member 236 is slidably attached to a respective one of the first pair of template elements 204 and a respective one of the second pair of template elements 206, such that the locating members 236 are able to move with the template elements in both the longitudinal and the transverse direction, whilst maintaining a constant spacing from the respective edges of the mortice aperture 202 defined by those template elements. Referring now to Figures 1A, 1B and 6D, in particular, the dimensions of the mortice aperture 202 can be set by direct reference to the back box 16 of a door strike 12, where one is present. Firstly, the door strike 12 is located on the first templating device 100 and the dimensions of the face plate aperture 102 are set appropriately following the method outlined above. The dimensions of the mortice aperture 202 are expanded to ensure that the back box 16 can be received therethrough. The second templating device 200 is then located on the first templating device 100, in its fixed position. The back box 16 is received through the mortice aperture 202 and the template elements 204, 206 of the second templating device 200 are re-positioned to engage the locating edges 236a of the locating members 236 with respective edges / faces of the back box 16 (Figure 1B and 6D). Once the templating elements 204, 206 of the second templating device 200 have been positioned correctly, the templating elements 204, 206 are secured in place by tightening the fasteners 130. Accordingly, the mortice aperture 202 is not only formed with the appropriate dimensions for the particular door strike to be installed, but also in the correct position relative to the face plate aperture 102 defined by the first templating device 100. It will be appreciated that an equivalent procedure can be followed to set the dimensions of the mortice aperture 202 relative to a detachable dust box of a door strike. The second templating device 200 is then removed from the first templating device100 and the door strike 10 and locating members 236 are removed. The first templating device 100 is secured to a door frame and the face plate recess is formed in the doorframe using the face plate aperture 102 as a template for the cutting tool, as described above. The second templating device 200 is again located on the first templating device 100 and a mortice recess is formed in the door frame, using the mortice aperture 202 as a template for the cutting tool. Due to the arrangement of the first and second templating devices 100, 200 as described, the face plate recess and mortice recess are formed not only with the required dimensions, but also in perfect alignment for the particular door strike being installed. The user can therefore form both recesses in quick succession, significantly simplifying the installation process. It will be appreciated that where numerous identical door strikes are to be installed, the jig 1 need only be set up once, and the jig 1 can then be moved from door to door to form both face plate and mortice recesses quickly, easily and accurately. The provision of two locating members 236, each forming an internal corner for receiving the back box of the door strike, allows the back box to be spaced on all four sides. It will be appreciated that the second templating device 200 could also achieve this by means of four locating members, each one being attached to a respective one of the template elements and defining a single, linear, locating edge to engage with a respective edge / face of the back box. Also, it will be appreciated that some door strikes will not include a back box and therefore the dimensions of the mortice aperture 202 cannot be directly derived from the door strike itself. In such scenarios, the dimensions of the mortice aperture 202 can be set by transferring the measurements of the opening in the door strike to the mortice aperture 202, accounting for the necessary offset. Also, the position of the mortice aperture 202 relative to the face plate aperture 102 would need to be determined and set by the user. This could be achieved by inserting the door strike in the first templating device 100, locating the second templating device 200 on the first templating device 100, and visually aligning the locating edges 236a of the locating members 236 with the opening of the door strike to correctly set the dimensions and position of the mortice aperture 202 relative to the face plate aperture 102. An implement such as a ruler could also be inserted through the mortice aperture 202 and engaged with corresponding edges of the locating edges 236a of the locating members 236 and of the face plate opening to provide correct alignment. Thus, even when the dimensions, shape and position of the mortice aperture 202 are set by the user without reference to a back box, once the first and second templating devices 100, 200 have been set up initially, the jig 1 can be used repeatedly on a number of door frames, and the advantages of the present invention are still obtained. Rebate spacers Figure 5 illustrates the use of the first templating device 100 for forming a recess in a substantially flat surface of a door frame 20. However, it is common that door frames have a rebate defining an L-shaped surface. The protruding portion of the L-shape acts as a door stop against which the face of a door is abutted when closed. The rebate may be formed in the timber at the point of manufacture, such that the rebated door frame is formed as a unitary structure. Alternatively, a rebated structure may be formed by fitting a secondary timber to the flat face of a door frame, to provide the door stop. Regardless of how the rebate is formed, it is often required to form a recess in a rebated door frame to accommodate a door strike. The recess generally needs to be positioned very close (within a few millimetres) of the protruding portion of the L-shaped structure. With the arrangement shown in Figure 5, for example, it would be necessary to position the first templating device 100 against the protruding portion of the door frame, leaving a gap between rear face of the templating device and the surface of the door frame in which recess is to be formed. It will be appreciated that this introduces significant instability. Referring now to Figures 7 and 8A to 8C, in order to address this, the first templating device 100 comprises a set of spacers 150. Each spacer 150 is removably locatable on the planar rear face of the body element 110 of the first templating device 100. Each spacer 150 has a substantially planar rear face 152, which lies parallel to the rear face of the body element 110, for locating against the door frame. A lateral edge 150a of the spacer 150 is located inboard of a lateral edge 110a of the rear face of the body element 110 that is located on the same side of the face plate aperture 102. In other words, a distance between a lateral edge 110a of the rear face of the body element 110 and the face plate aperture 102 is greater than a distance between the lateral edge 150a of the spacer 150 and the face plate aperture 102. As shown in Figures 8B and 8C, for example, this allows the spacer 150 to be located against the rebated portion 22 of the door frame 20, with the body element 110 being located against the protruding portion 24 of the door frame 20, such that a stable configuration is achieved. Two spacers 150 are provided, which are located on either side of the face plate aperture 102 in the longitudinal direction L (i.e. above and below the face plate aperture 102 as shown in the Figures). It will be appreciated that the depth of the protruding portion 24 of the door frame 20 (i.e. the depth of the rebate) may vary. Accordingly, it is preferred that the distance by which each spacer 150 extends from the rear face of the body element 110 in a direction perpendicular to the rear face is extendable. This allows the working depth of the spacer 150 to be adjusted according to the depth of the rebate. In the illustrated embodiment, this is achieved by each spacer 150 comprising a plurality of stackable spacer portions 154, 156. A first spacer portion 154 provides a spacer 150 having a first depth to accommodate a relatively shallow rebate (Figure 8B) and a second spacer portion 156 can be attached to the rear face of the first spacer portion 154 to provide a spacer 150 having a second depth, greater than the first depth, to accommodate a relatively deep rebate (Figure 8C). In principle, each spacer 150 could comprise any number of stackable spacer portions to account for different rebate depths. However, rebates typically exhibit a limited number of standard depths. In general, rebates have a depth of either 12mm (for internal domestic doors) or 25mm (for commercial doors or fire doors). Therefore, the majority of rebated door frames can be accounted for by a spacer comprising two stackable spacer portions. Generally, it is desirable that the face plate recess is formed in the door frame as close as possible (within a few millimetres) of the protruding part 24 of the rebated structure. In order to achieve this, it is desirable that the lateral edge 150a of the spacer 150 lies in a plane that encompasses a longitudinal edge 122a of the face plate aperture 102, or that overlaps with the face plate aperture 102 when viewed in a direction perpendicular to the rear face of the body element 110. If, for example, the lateral edge 150a of the spacer 150 were to lie in a plane that is located outboard of the face plate aperture 102, the proximity of the face plate aperture 102 to the protruding portion 24 of the door frame 20 would be limited by the spacer 150. To allow the first templating device 100 to be secured to the door frame 20 when using the spacers 150, each spacer 150 comprises a plurality of holes 158 corresponding to the holes 148 formed in the body element 110. When the spacers 150 are located on the rear face of the body element 110, the holes 158 of the spacers 150 align with the holes 148 of the body element 110, to allow a bradawl 144 (or other fastening member) to be inserted through cooperating holes148, 158 in the body element 110 and spacer 150 and into the door frame 20. The spacers 150 are located on the rear face of the body element 110 by means of recesses 160 formed in the rear face of the body element 110 and corresponding protrusions 162 provided on the spacers 150. This arrangement ensures that the body element 110 retains a substantially planar rear face for abutting against a flat door frame when being used without spacers 150. Alternative means of attachment are conceivable. Stoppers The first templating device 100 further comprises two stoppers 164 extending from the rear face of the body element 110 in a direction perpendicular to the rear face of the body element 110. The stoppers 164 are repositionable in the transverse direction T. In the illustrated embodiment, each stopper 164 is received within a track 166 extending in the transverse direction T and can be fixed at any location along the track 166, such that the transverse position of the stopper 164 is continuously variable within the boundaries of the track 166. In use, as shown in Figures 8A to 8C, the stoppers 164 extend away from the rear face of the body element 110 and engage with a face 26 of the door frame 20 that is perpendicular to the face in which the recess is to be formed. Accordingly, the stoppers 164 restrict the movement of the first templating device 100 relative to the door frame 20 in the transverse direction T. The stoppers 164 can therefore be used to position the face plate aperture 102 appropriately in the transverse direction T. In this regard, it will be understood that a sprung door latch will be located within a side face of a door. The sprung door latch will typically have a curved back face and a flat front face. In use, when the door is shut, the curved back face will engage with the tongue of the door strike and so retract within the latch mechanism. Once the latch reaches the opening of the door strike, the latch is released such that it extends into the opening. The flat front face of the latch then engages with an edge of the opening so as to prevent the door from being opened until the sprung latch is again retracted, e.g. by operation of a door handle. In order to prevent rattling of the door, it is desirable that the flat face of the door strike is aligned as closely as possible with said edge of the door strike opening. Therefore, installation of the door strike in the correct position in the transverse direction is critical. With the arrangement described above, the stoppers 164 can be positioned in the transverse direction T to locate the face plate aperture 102 relative to the front face 26 of the door frame 20. Accordingly, the jig 1 can be set up to ensure the correct position of the face plate aperture 102 on the door frame 20 in the transverse direction T. As shown in Figure 1A, for example, a scale 168 may be provided on the outer face of the first templating device 100 that correlates the position of the stopper 164 in the transverse direction T to the measured position of the door latch with the side face of the door. The user can thereby easily set the transverse position of the stopper 164. It is also desirable that a dimension of the stopper 164 in a direction perpendicular to the rear face of the body element 110 is sufficient to account for different rebate depths (cf. Figures 8A to 8C). However, at the same time, it is desirable that the dimension of the stopper 164 is no longer than necessary to avoid contact with nearby fixtures, such as an adjacent wall. Therefore, in the illustrated embodiment, each stopper 164 comprises a plurality of stackable stopper portions 170, 172, 174, such that the dimension of the stopper 164 in a direction perpendicular to the rear face of the body element 110 is extendable. A first stopper portion 170 is arranged to attach to the body element 110 within the track 166. This first stopper portion 170 can be used alone where the first templating device 100 is located against a flat face of a door frame 20 (Figure 8A). A second stopper portion 172 is arranged to attach to the first stopper portion 170, so as to extend the dimension of the stopper 164 in a direction perpendicular to the rear face of the body element 100. The first and second stopper portions 170, 172 can be used in combination, where the first templating device 100 is located against a rebated door frame 20 having a relatively small rebate depth (Figure 8B). The dimension of the stopper 164 in this configuration is greater than the dimension of the first spacer portion 154, such that the stopper 164 can extend at least partially across the front face 26 of the door frame 20 (perpendicular and adjacent to the face of the door frame 20 in which the recess is being formed). A third stopper portion 174 is arranged to attach to the second stopper portion 172, so as to further extend the dimension of the stopper 164 in a direction perpendicular to the rear face of the body element 110. The first, second and third stopper portions 170, 172, 174 can be used in combination, where the first templating device 100 is located against a rebated door frame 20 having a relatively large rebate depth (Figure 8C). The dimension of the stopper 164 in this configuration is greater than the dimension of the first and second spacer portions 154, 156 combined, such that the stopper 164 can extend at least partially across the front face 26 of the doorframe 20 (perpendicular and adjacent to the face of the doorframe 20 in which the recess is being formed). Where the jig 1 comprises both a spacer 150 and stopper 164 as described above, the first spacer portion 154 may have a thickness (a dimension in a direction perpendicular to the rear face of the body portion 110) that is equal to the thickness of the second spacer portion 156. The thickness of the first and second spacer portions 154, 156 may be equal to a thickness of each of the second and third stopper portions 172, 174. Thus, when the first templating device 100 is configured with a spacer 150 having a first dimension by using only the first spacer portion 154, the corresponding dimension of the stopper 164 can be increased by the same amount by adding the second stopper portion 172 to the first stopper portion 170. In the same way, when the dimension of the spacer 150 is increased by adding the second spacer portion 156, the corresponding dimension of the stopper can be increased by the same amount by adding the third stopper portion 174 to the second stopper portion 172. This allows the dimension of the stopper 150 to be increased no more than necessary, to account for the use of the spacer 150. As shown in the illustrated embodiments, it is preferred that the thickness dimensions of the second and third stopper portions 172, 174 are equal, and that the thickness dimension of the first stopper portion 170 is less than that of the second and third stopper portions 172, 174. In one example, the first stopper portion 170 has a thickness dimension of 5mm and the second and third stopper portions 172, 174 each have a thickness dimension of 12.7mm. It will be appreciated that the thickness dimension of the first stopper portion 170 refers to a distance by which the first stopper portion 170 extends from the planar rear face of the body portion 110, in use. A further embodiment of a jig 1 ’ in accordance with the present invention is shown in Figures 9A to 11C. The majority of features are identical to the embodiment described above and description thereof will not be repeated. The jig 1 ’ differs in that the first templating device 100’ comprises a sub-body 111’ defining the face plate aperture 102’, the sub-body 111’ being removably attachable to the body element 110’ such that, when attached as shown in Figure 9B, the face plate aperture 102’ overlies the opening 114’ of the body element 110’ to permit the face plate aperture 102’ to be used as a template for forming the face plate recess in a door frame, in the manner described above. The body element 110’ comprises a plurality of recesses / holes 112’ arranged to receive corresponding protrusions formed on a rear surface of the sub-body 111 ’ so as to locate the subbody 11T on the body element 110’ in a fixed position. As shown in Figures 10A and 10B, the second templating device 200’ is substantially identical to that of the embodiment described above. The second templating device 200’ can be attached to the sub-body 110’ of the first templati ng device 100’ via holes / recesses 113’ formed on an outer surface of the sub-body 111 so as to locate the second templating device 200’ on the first templating device 100’, with the mortice aperture 202’ overlying the face plate aperture 102’ as described above. This allows the shape, dimensions and position of the face plate aperture 102’ and mortice aperture 202’ to be set by the user in the same manner as described above in relation to the first embodiment. Figures 11A to 11C illustrate the use of the jig T for forming recesses in a door frame 20’. As shown in Figure 11A, the body element 110’ of the first templating device 100’ is secured to the door frame 20’ (for example using a bradawl or similar fastening member). The subbody 11T of the first templating device 100’ is then attached to the body element 110’ in a fixed position (with the dimensions of the face plate aperture 102’ already set appropriately) as shown in Figure 11B. A face plate recess can then be formed in the door frame 20’ using the face plate aperture 102’ as a template. It will be appreciated that locating members 136’, 138’ will be removed prior to the cutting operation. As shown in Figure 11C, the sub-body 111’ is removed from the body element 110’ of the first templating device 100’. Subsequently, the second templating device 200’ is attached to the body element 110’ of the first templating device 100’ in place of the sub-body 111 ’ in a fixed position (with the dimensions of the mortice aperture 202’ already set appropriately). A mortice recess can then be formed in the door frame 20’ using the mortice aperture 202’ as a template. It will be appreciated that locating members 236’ will be removed prior to the cutting operation. This arrangement allows the thickness dimension of the jig T to be minimised when the jig 1 ’ is being used to form the mortice recess, since the mortice aperture 202’ does not need to overlie the face place aperture 102’ when the mortice recess is being formed. The mortice aperture 202’ can therefore be positioned closer to the door frame 20’ during use as a cutting template. As shown in Figures 9A and 11 A, in particular, the body element 110’ of the first templating device 100’ is recessed to separately accommodate the sub-body 111’ and the second templating device 200’. The invention has been described above with reference to specific embodiments, given by way of example only. It will be appreciated that different arrangements of the system are possible, which fall within the scope of the appended claims.

Claims

1. A templating device for use in forming a recess or opening in a door frame or other substrate for accommodating a piece of hardware, the templating device comprising5 an aperture defining a template for forming a recess for a piece of hardware, wherein atleast one dimension of the aperture is adjustable;a body element;a template element that is movable relative to the body element so as to define a dimension of the aperture; and10 a locating member arranged to engage with the template element so as to be movable withthe template element and, when engaged with the template element, to extend inwardly into the aperture to locate a piece of hardware in the aperture, the locating member comprising at least one locating edge that is aligned with the aperture and is spaced inwardly from an edge of the aperture by a predetermined distance so as to, in use, define a spacing between an edge of the aperture and15 an edge of said piece of hardware so that the piece of hardware is spaced inwardly from the edge of the aperture.

2. A templating device as claimed in Claim 1 wherein the locating member is removable from the template elements to allow the cutting operation to be performed.

203. A templating device as claimed in Claim 1, wherein the locating member remains attached to the template element but moveable away from the edges of the aperture so as to not obstruct a cutting operation performed using the aperture as a template.25 4. A templating device as claimed in any preceding claim comprising a plurality of templateelements, each being movable relative to the body element to define a dimension of the aperture, the templating device further comprising a plurality of locating members, each locating member being arranged to engage with a respective one of the template elements so as to be moveable therewith, and to locate a piece of hardware relative to the aperture, each locating member30 comprising at least one locating edge that is aligned with the aperture and is spaced from a respective edge of the aperture by a predetermined distance so as to, in use, define a spacing between an edge of the aperture and an edge of said piece of hardware.

5. A templating device as claimed in any preceding claim wherein, the or each locating35 member comprises a seat portion and a wall portion extending substantially perpendicularly to the seat portion to define a locating edge of the locating member.

6. A templating device as claimed in any preceding claim comprising at least one locating member having a seat portion and two wall portions extending perpendicularly to the seat portion,04 07 25the two wall portions defining an internal corner therebetween, each wall portion defining, in use, a locating edge of the locating member.

7. A templating device as claimed in any preceding claim comprising at least one locating5 member having a seat portion and two wall portions extending perpendicularly to the seat portion, the two wall portions defining an external corner therebetween, each wall portion defining, in use, a locating edge of the locating member.

8. A templating device as claimed in any preceding claim comprising a plurality of locating10 members, each locating member comprising a seat portion, wherein the seat portion of each locating member lies in a common plane that is parallel to a substantially planar outer surface of the templating device.

9. A templating device as claimed in any preceding claim comprising a first pair of template15 elements, each one of the first pair of template elements being movable relative to the body element in a first direction to define a dimension of the face plate aperture in the first direction.

10. A templating device as claimed in Claim 9 comprising a first pair of locating members, each of the first pair of locating members being arranged to engage with a respective one of the first pair20 of template elements to move therewith and having a seat portion and two wall portions extending perpendicularly to the seat portion, the two wall portions defining an internal corner therebetween, each wall portion defining, in use, a locating edge of the locating member, wherein one of the locating edges is parallel to and inwardly spaced from an edge of the template element defining an edge of the aperture and the other of the locating edges is parallel to and inwardly spaced from an25 adjacent edge of the aperture.

11. A templating device as claimed in Claim 10 wherein each locating member is removably attachable to a respective one of the first pair of templating elements.30 12. A templating device as claimed in any one of Claims 9 to 11 comprising a second pair oftemplate elements, each one of the second pair of template elements being movable relative to the body element in the first direction to define a dimension of the aperture in the first direction and in a second direction, perpendicular to the first direction, to define a dimension of the aperture in the second direction.3513. A templating device as claimed in Claim 12 comprising a second pair of locating members, each of the second pair of locating members being arranged to engage with a respective one of the first pair of template elements to move therewith and having a seat portion and two wall portions extending perpendicularly to the seat portion, the two wall portions defining an external cornertherebetween, each wall portion defining, in use, a locating edge of the locating member, wherein each of said locating edges is parallel to and inwardly spaced from a respective edge of the template element with which the locating member is engaged.5 14. A templating device as claimed in Claim 13 wherein each locating member is preferablyremovably attachable to a respective one of the second pair of templating elements.

15. A method of forming a recess in a door frame or other substructure for accommodating a piece of hardware, the method comprising:10 providing a templating device in accordance with any preceding claim;engaging the locating member with the template element;abutting an edge of a piece of hardware against the locating edge of the locating member; adjusting at least one dimension of the aperture in dependence on a correspondingdimension of the piece of hardware by moving the template element relative to the body element;15 securing the templating device to a door frame or other substructure; andforming a recess in the door frame or other substructure using the aperture of the LO templating device as a template for a cutting tool.CM

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