John,
Are you thinking of Training Integrated or Modular? If you go down the Modular route (so that you can continue to work whilst training, plus its cheaper!) then I would go to Bristol Ground school to do your ATPL Theory through a distance learning course.
They are extremely organised with a huge amount of experience and are very helpful.
I passed all 14 exams 1st time with there help! Something that I never thought I could do.
Check out
www.bristol.gs.
Chris