An adjustable hinge for mounting an openable member to a frame, the hinge comprising: a fixed plate, an adjustable plate and a pivot member pivotally connecting the fixed plate and the adjustable plate; wherein the adjustable plate comprises: a fixing plate for fixed attachment to one of the openable member and the frame; a floating plate movable relative to the fixing plate in a first axis and in a second axis and configured for pivotal connection to the fixed plate, said floating plate having a first slot and a second slot therein, said first and second slots (30, 32) being perpendicular to one another and each comprising two bearing surfaces substantially parallel to the sides of the respective slots; a first adjustment means comprising a first eccentric cam rotatable in said first slot to adjust the position of the floating plate relative to the fixing plate in a first axis; and a second adjustment means comprising a second eccentric cam rotatable in said second slot to adjust the position of the floating plate relative to the fixing plate in a second axis; wherein said first and second eccentric cam (34, 36) each comprise a circular cam surface, said circular cam surfaces having a diameter substantially equal to the separation of its corresponding two bearing surfaces; characterised in that each eccentric cam (34, 36) further comprises a location surface comprising a regular polygon having an even number of sides, said sides of the location surface of each eccentric cam (34, 36) aligning with the circular cam surface substantially at their centre, and extending beyond the cam surface at either end, the location surface configured to act on the respective bearing surfaces to prevent rotation of the respective first and second eccentric cams, wherein the each eccentric cam (34, 36) is moveable along its axis of rotation between a first position in which the cam surface is located between the bearing surfaces and a second position in which the location surface is located between the bearing surfaces and rotation is prevented. a fixing plate for fixed attachment to one of the openable member and the frame; a floating plate movable relative to the fixing plate in a first axis and in a second axis and configured for pivotal connection to the fixed plate, said floating plate having a first slot and a second slot therein, said first and second slots (30, 32) being perpendicular to one another and each comprising two bearing surfaces substantially parallel to the sides of the respective slots; a first adjustment means comprising a first eccentric cam rotatable in said first slot to adjust the position of the floating plate relative to the fixing plate in a first axis; and a second adjustment means comprising a second eccentric cam rotatable in said second slot to adjust the position of the floating plate relative to the fixing plate in a second axis; wherein said first and second eccentric cam (34, 36) each comprise a circular cam surface, said circular cam surfaces having a diameter substantially equal to the separation of its corresponding two bearing surfaces; characterised in that each eccentric cam (34, 36) further comprises a location surface comprising a regular polygon having an even number of sides, said sides of the location surface of each eccentric cam (34, 36) aligning with the circular cam surface substantially at their centre, and extending beyond the cam surface at either end, the location surface configured to act on the respective bearing surfaces to prevent rotation of the respective first and second eccentric cams, wherein the each eccentric cam (34, 36) is moveable along its axis of rotation between a first position in which the cam surface is located between the bearing surfaces and a second position in which the location surface is located between the bearing surfaces and rotation is prevented.