I know the two main places are:
University of Law
BPP
Most people say that UoL is the more traditional and orthodox route for most people, but BPP has really good connections for 'magic circle' and big law firms.
Both are equally good, but it depends if you want a shot at the big city firms or just have the stock GDL.
A lot of graduates from top universities and those who got a first class honours go to BPP because of the links they have, but I think that both of them are good. I know of people who went to both and ended up pretty well, so it might be a case of preference too.