Yep fair point Amy, sorry.
Lucie, the legislation is about the representation on film, not the act itself. Do you mean that the "vice squad" (or whatever) might trawl AW looking for providers who offer services which if offered in UK-made porn would be illegal, and then buy their films to see if they contain any banned material? Honestly I doubt they would go after individual small-scale providers. I don't know if even anybody has yet been prosecuted under the new laws.