I believe Gloucestershire Airport is a great Airport to learn to fly, It is very helicopter friendly and i believe is the busiest training airport in the country and as such provides a great environment for training.
There a a number of good helicopter training schools on the airfield approved by the CAA. Rise Helicopters has a good fleet of helicopters which is great once you get your licence as there is always availability for self fly hire. It also has maintenance on site so availability and serviceabilty levels are very high.
I agree with other threads that visiting all the training schools and Ray Jones is important as you would benefit from flying where you feel most comfortable. At the end of the day you are spending a lot of money!