ChewyTheWookie,
I suppose this depends entirely upon how far you willing to commute and at what cost.
I would strongly recommend Old Sarum Flying Club, Salisbury. One thing in particular i have noticed about Old Sarum is that they allow students to take flying at their own pace. In addition to this they also offer the type of discount schemes and accounts that Bob Stinger discussed. For example if you are willing to pay £1000 up front, the club will put an additional 10% (£100) into your account. This stands for every £1000 placed in your account.
Alternatively, they also offer both a PPL special deal and also a frequent flyers scheme.
Or if you'd really like, just pay as you go.
If you'd like any further information please call Old Sarum Flying Club on 01722 322525
Hope this helps,
BB