Judging from the clips, SNL UK has a curiously mid-Atlantic pitch. There's a space in British television for a mainstream, topical sketch show, and maybe it'll develop into something as the overall reaction seems to have been 'not as horrible as anticipated', but you simply can't appeal to a British mainstream sensibility and an American mainstream sensibility at the same time. So if they don't do a reverse 'Office' and basically go in their own direction with it after the first episode, I can't see it surviving beyond its initial curiosity value. So... now you know.