For the final two Higson books the publisher released what might be more accurately called Galleys. But as far as I know, these were the only advance copies. Hurricane Gold came in two variants.
The only proof I have for the Steve Cole books is Shoot To Kill. I don't know if proofs exist for his other three books.
U.S. publisher Miramax produced proofs for the first two Charlie Higson books. As far as I know, these are the only U.S. proofs for any of the Young Bond titles.