Craig
As you're based at Compton, then one option for the ground school is to contact Derek Davidson (who advertises in most of the flying mags) - he's based in Bournemouth and offers 5 day intensive ground school courses. He's an ex CFI who I learnt to fly with.
However, the best advice is to work it all out for yourself by reading the books, then test yourself using the PPL Confuser (or airquiz.com) - do NOT use the PPL Confuser as your revision tool!