When you said Tory college I thought Caius, but there you go. But don't select a college based on its perceived political allegiance, it's really not worth it... you'll find plenty of people to agree and disagree with at every college. On top of that, most political stuff happens on a university level rather than a collegiate level, e.g. at the Union, various political societies/clubs, and so on. If you end up in a college you don't like that much because you think more people there will be Conservative supporters, you'll regret it.