Took me old 05 van for an MOT today, checked it all, everything working, got to the MOT station, no brake lights. Luckily I know the garage owner. Did some checks with me multi meter and it was the switch. 5 Min fix with the part off the shelf from the factors up the road. BUT with the van the age it is, the chances of the switch going in the 20 mins on the way to the station must be soooooooo small!!