Hey There,
I've just started my PPL at Enstone airfield with Enstone Flying Club. They have a pretty nice modern fleet, which consists of a DA-20 Katana, Warrior, TB-9 (Which i'm doing my training in), TB-10, TB-200, TB-20 and DA-40 Diamond Star. Although they don't offer packages, if you do the maths and work it out a JAR-PPL course comes to around £5k using the DA-20. Although i'm training on the TB-9 i've been up in the DA-20 and its a joy to fly, very easy, simple and has good performance specs. The instructors there are a great bunch, and they aren't in it for the money either; if they feel that the weather is still alright to fly in but will not be very benificial to the student they will reschedule for a better day regardless of the fact that they could still take you up anyway - basically they put you first. Also, the club itself has a really friendly and welcoming atmosphere about it, and so do the other members! I know its a bit of a trek from London but some of the members do actually come from there, so if you're over in the West side of London it might be an option for you. Here's a link to the website
http://www.enstone-flyingclub.co.uk/ Hope this helps!