I used to instruct at Cranfield, and all I will say I that you should be a little wary of negative comments about various schools, theres a large amount of bitchiness between some of the schools/clubs there.
The best thing you can possibly do, is go there at the weekend, spend all day looking around, chatting to the students, members, etc.
visit Taylor Aviation, Bonus, Billins, FlyTeam, Cranfield Aero Club, Cabair.. and whoever else has sprung up there recently
Get a feel for the one you like best, and go with them, prices vary greatly at Cranfield, and dont assume that expensive means better.
What you want is good quality instruction and a decent friendly atmosphere, dont be bowled over by glossy brochures, snazzy booking systems or anything pointless like that.
Also, try not to pay money up front!!!
PM me if you want to ask anything else