White base with discoloured yellowed lid.
The base and top of this plug are made from different plastics. The base is much harder and has remained white. The top is a softer material and has yellowed significantly.
Lid has the WG logo and FUSED.
Pins are unsleeved. The white base has several large cracks probably caused by dropping the plug onto a hard floor.
The flex grip is missing - this would have been a flat bar fixed with two screws. The fuse is also missing.
The interior of the lid has not yellowed at all, suggesting the yellow was caused by exposure to sunlight.
Made in England, 229 WG BS1363, 250V, 13 Amps.
Cord grip screws are marked, and pins are identified with E, L and N.