Just had my 54 plate Gen1 MOT'd and, apart from an iffy horn, now replaced, no problems from the tester.
I did notice, however, that when he was trying the horn, the brake light came on. This is not something I've come across before, but, as the tester wasn't bothered, should I be? Anyone else had this happen and is it a sign of impending disaster or something I can safely ignore?