I've been discussing on another group what standard of bodywork repair is permissible to pass the MOT and meet other UK regulations.
I had a rather ratty VW camper which I ran for several years, but had no real problems with the MOT. I had many of the panels held together with pop rivets and metal sheets - I even used a coke can once in an emergency. There was a very liberal application of filler and fibreglass on the wheel arches, and I made sure there were no sharp edges. This was all on the non structural areas though. Anything like seat belt mounts and chassis members were welded solid, and I always made sure that brakes, suspension, steering etc were OK.
I've now got a much better camper, but I'm being told that repairs must all be seam welded even in non structural areas. Is this so?