I believe BGS are still distance learning only, though if you're studying full-time at home, you'll get through fairly quickly. Give them a call and they'll give you all the gen.
Bristol Flying Centre (now Bristol Aviation) has a good reputation for modular flying but don't know what it is currently like, with the recent changes. I've no reason to believe that it's not as good as it used to be, but get some feedback from current students.
And in case you don't know - ignore anything dartagnan posts. Bit of a reputation and all that........