A hinge assembly for a foldable working platform, said hinge assembly comprising a hinge body (22), first and second hinge arms (24,26) connected to the hinge body (22), the first hinge arm being rotatable relative to the hinge body about a first axis of rotation (28), the second hinge arm being rotatable relative to the hinge body about a second axis of rotation (30), wherein the first and second axes (28,30) are non-coaxial and wherein movement of the hinge arms beyond the open position is restricted by interaction of abutment portions of the first and second hinge arms with respective abutment portions of the hinge body.