Good Luck Martyn.:thumb: BTW mine has amber at the front and Red to the rear. Only problems I had was with one bad earth on a marker on the rear which I found before the MOT was done. Seems he's a little overzealous.Do they test many RV's? I can understand the thought that if it's fitted, it must work.I've been told this before during MOT's but the guys I use are very helpful and normally change bulbs, get it going for me if there is a problem.