I cannot recommend this guy enough:-
http://www.tommybee-bikertraining.co.uk/
Tom is a straight forward decent guy who will make all efforts to help you pass your test and help you improve your riding no end.
All other riding schools training was on a weekend but this guy met me through the week, in a convenient location and at the right time.
I have recommended several people who have gone on to pass with him without being ripped off!
Pickles, let us know how you go.