One thing I've never been able to discover is where, apart from the scuttle front edge on later cars, is the body-shell ident. number(s) located.
Now, if it is, as I think, only on the scuttle rail and as the scuttle rail is one of the rusty parts which is almost always replaced, what happens to the ID of the shell?
I asked my MoT person and he said he never checks with a Mini as the number is usually missing. He just checks the riveted-on VIN plate for the numbers.
I asked a police inspector friend who is also a Min I enthusiast and he said that if the number is required just get a set of metal number stamps and re-stamp the new scuttle panel or cut out the ID from the old panel and weld it into the new one.
So when replacing the scuttle rail do you stamp the numbers in anew, leave all the numbers off or weld in the small length with the numbers. How on earth will that confirm the originality or otherwise of the shell. In fact that also applies to other classic cars. It's only modern cars which have body-shell numbers which should always be identifiable.
The entire argument about re-shelling classic cars is nonsense and never happened when the Mini was a more current non-classic. Even large body-shops used to re-shell with good used shells and insurance companies paid for it, especially when a Mini had been rolled or had a severe front-end shunt.
Re-shelling of Minis is very common, especially with the early cars and that keeps the cars alive. I know I would re-shell my 1964 Cooper 'S' if I crashed it badly.