I am getting conflicting information regarding fixing a warning sign on the back box on the Motorhome. It sticks out 40cm past the rear lights and we are off to France/Belgium/Luxembourg/Germany next week. Looking at a couple of sites eg Caravan Club and Gem - it looks as if I dont need one, but other forums say I do. I am struggling to to get one which I can fix without drilling the box which I am loathe to do so would rather not put one on if I dont need it. I expect I will get conflicting replies but hey ho!