A hinge cover assembly (10) for a hinge having an elongate hinge arm has first and second cover members (20, 22) mountable about the hinge arm so as to completely encircle the hinge arm over at least part of its length. The first cover member (20) has a channel portion (24) which surrounds the arm on three sides and the second cover member (22) is mountable to the first enclose the arm on the other side. The first cover member (20) has locking projections (46) on the inner surface of a side wall that engage in apertures in the hinge arm. The cover assembly (10) is particularly suited for use with a swan neck hinged used to mount a boot lid to a vehicle body. A housing portion (32) of the first cover member encapsulates a mounting structure of the hinge and may have a clip formation for clamping an edge region of a trim panel mounted to the boot lid.