Never seen this before.
Driving to work I noticed a rattle in the car. Sounded like a stone rattling round behind the dashboard at first.
A few roundabouts later I decided the rattle was coming from both the front AND rear. WTF I thought.
I had washed the car the previous day so wondered if I'd dislodged something.
Anyway on the way back from work I noticed that my interior lights where not working - only the footwell and button lights were working.
Anyway I put two and two together and thought perhaps a bulb had come loose and blown the fuse.
Checked fuse - fuse OK.
Removed the rear interior light cover to discover this:
Every single one of them has either popped or snapped off.
What on earth could cause that to happen!