A day before MOT last week, the rear burnt bulb warning light came on on the dash whilst driving. I checked all the lights including the brake lights and all was working. I then switched off the engine, started the car and bingo all sorted. Took the car for MOT and it passed first time. Whilst driving lastnight, this light came on again. All the lights are working fine including the brake lights.
It has gone since off now but what could it be?