Believe you can do them in Glasgow and also think Coventry..
Any reason why you wish to do them full time at a school? Have you considered full time distance learning? I did mine at Bristol over 5 months. You study at home and then the week before the exams do a 2 week refresher course at BGS.. If you can work at home and are prepared to put the work in, it's a good way of doing it. It worked for me, but I know others who have said it wont for them. Honestly say it wasn't too bad working from home and saved me 3 months on a full time course. Just a thought.