I had a rear brake light out so I went to Halfords, whacked in the car details and chose the one it said would it - GE 380
Changed the bulb and the Mrs said the brakes came on.
Just went for a drive and the bloody dash lights up every time I brake.
Fished the old bulb out the bin, it's dual filament, the one Halfords said to use isn't.
I assume this is the most likely cause of the issue?