I found it hard to study so scoured the back of Pilot magazine. I can personally recommend Derek Davidson for groundschool. He's down at Bournemouth and him and his wife will do a subject a day with an exam in the evening. It is intense, hard work and you'll need to put the effort in but in a week I had all my exams done bar Air Law which I already had. And I got 100% in a couple of them!
Local B&B to stay in, small classes, (it was just me and one other guy all but one day when there was a third) and gallons of tea and sandwiches. Highly recommended...