Right then! I swapped the rear numberplate bulbs, boot bulb and nap lights for LED bulbs. All worked. Today I realised I'd lost illumination for the standard stereo, the steering wheel cruise and radio controls, and also my rear lights. Any clues as to what's caused this? No fuses in the first two fuseboxes have blown. It was a bit too wet dark and late to check the third hidden one. Obviously I can replace the blown fuse, but has anyone got an idea what caused it to go in the first place? I'm not an idiot with cars so I'm surprised it's happened.