second Sion, go to CATS!
Another thing to remember is you will have to take 2 weeks off revision and then another week off for you exams, not sure if you work but some jobs dont let you take 3 weeks off in a row. With CATS its a week ground school, (included in price) and then week at home/work then exams. Much easier to manage.
Look around on ebay/pprune for old books, i picked up an old oxford set of notes for £40 for the entire set! I think pooleys have a couple of old sets they want to sell on cheap, give their warehouse at cranfield a call.
UAV