A hinge mechanism comprising: first and second members (12,14) rotatable relative to one another about a hinge axis from a first to a second position; and a biasing arrangement operative to adopt an active mode to bias the first and second members (12,14) into at least one relative position, the biasing arrangement comprising a cam having a cam surface and a drive arrangement, the cam surface being disposed on the first member and the second member including the drive arrangement, the drive arrangement comprising a biasing device and a drive member which can be biased into an extended position by the biasing device and is movable from the extended position against the bias of the biasing device, the drive member including an engagement surface which is operative to contact the cam surface during relative rotation of the first and second members (12,14) and, during a second selected angular displacement between the first and second positions, the contact between the cam surface and the engagement surface causes the drive member to move from the extended position, characterised in that, the engagement surface is profiled to include a recess to accommodate at least a portion of the cam to allow free rotation of the cam relative to the engagement surface without biasing the drive member from the extended position during a first selected angular displacement of said first and second members (12,14), and when the drive member is in the extended position, the biasing arrangement is in an inactive mode such that the drive member does not provide bias to the first or second members (12,14) to undergo relative rotation such that the biasing arrangement remains in the inactive mode on relative rotation of the first and second members (12,14) through the first selected angular displacement between the first position and the second position, and is in the active mode on relative rotation of the first and second members (12,14) through the second selected angular displacement between the first position and the second position, wherein the drive arrangement is in the form of a piston cylinder arrangement including a piston and a cylinder, the piston forming the drive member and being movable within the cylinder along a piston axis which is arranged to be transverse to the hinge axis. first and second members (12,14) rotatable relative to one another about a hinge axis from a first to a second position; and a biasing arrangement operative to adopt an active mode to bias the first and second members (12,14) into at least one relative position, the biasing arrangement comprising a cam having a cam surface and a drive arrangement, the cam surface being disposed on the first member and the second member including the drive arrangement, the drive arrangement comprising a biasing device and a drive member which can be biased into an extended position by the biasing device and is movable from the extended position against the bias of the biasing device, the drive member including an engagement surface which is operative to contact the cam surface during relative rotation of the first and second members (12,14) and, during a second selected angular displacement between the first and second positions, the contact between the cam surface and the engagement surface causes the drive member to move from the extended position, characterised in that, the engagement surface is profiled to include a recess to accommodate at least a portion of the cam to allow free rotation of the cam relative to the engagement surface without biasing the drive member from the extended position during a first selected angular displacement of said first and second members (12,14), and when the drive member is in the extended position, the biasing arrangement is in an inactive mode such that the drive member does not provide bias to the first or second members (12,14) to undergo relative rotation such that the biasing arrangement remains in the inactive mode on relative rotation of the first and second members (12,14) through the first selected angular displacement between the first position and the second position, and is in the active mode on relative rotation of the first and second members (12,14) through the second selected angular displacement between the first position and the second position, wherein the drive arrangement is in the form of a piston cylinder arrangement including a piston and a cylinder, the piston forming the drive member and being movable within the cylinder along a piston axis which is arranged to be transverse to the hinge axis.