Thank you all for your input so far! Got lots for me to study between now and Sept.
I chose Chandler really not because it is the cheapest but i've heard nothing but good reviews from people who have used them. That said...it still works out around £65 ph (incl. tax) for a C172 compared to my current clubs eyewatering rates of £180 ph. 50 hours over my 2.5 weeks could prove to be optimistic given the current temperate like SoCal said. I can imagine i'll be sweating my neck off at 3000ft let alone on the ground! I shall take it as it comes and stick within my limits. If i do enjoy it enough then I will definately be returning.
I suppose this is a question I should ask the flight school now but might as well whilst i'm here... Do you pay for fuel at other airfields using your own card/cash and the flight school reimburse you or do they give you some sort of fuel card? I assume you are responsible for refuelling the aircraft yourself in most cases?