Idk dude, I mean it's a good idea, and I would love to see crime and cultural satire from a British point of view, but I think that satire, which underlines what GTA is, is something that Rockstar can only, and chiefly capture in an American point of view, being that they are an American developer and that the audience, while obviously huge from their selling numbers, is also fixed on American values and popular culture.
If it was created by a British developer I would be all over it but I don't think I've heard of a showstopper developer from there that could be on R* caliber.