Electrical socket apparatus comprises a frame-shaped square front plate and a circular socket box which, in use, is set in a similarly shaped opening formed in the wall or other surface. The front plate includes fixing elements” positioned to engage complementary fixing elements present on or in an inwardly extending lip around the periphery of the open end of the socket box. The front plate is dimensioned to cover, in use, the entire periphery of the open end of the socket box. In use, the front plate is trapped between a switch and the wall surface within which the socket box is located.