I know it's not near Reading, but it might be worth having a wander up to Cranfield. There are so many flying schools there and its worth having a walk around and looking for the best deal. I did my JAR PPL in 45hours over about 4 months on the C150/172 and it came to just over £5000 inc books, tests, medical, landing fees etc. Very good value and excellent training at
www.billinsair.freeserve.co.uk . All the best