I noticed the other day that my driver side brake light was out so I went to change the bulb but the bulb was fine.
So put it back still nothing. Wriggled it round a bit and it came on

...........but........went over a bump and it went off again

Repeated my original step but same result!
Pretty stumped on what to do other then replace the bulb cluster but that seems a bit drastic for a lose bulb?!
Any ideas??