HI,
I fly from Elstree. Flyers don't have a C152, they use PA28's as their main training aircraft. Ivan who runs flight training is a nice guy, and Vicky who runs Flyers is great. IMHO they are both good places to learn.
I would suggest the same for anyone who is looking at a flight school - it's an important decision, so go along and speak to the people. You'll get an idea of how the school is run and what the place feels like better. It's probably the most important thing to feel at home, and I've been very lucky because I've found my place here are flyers. They organize weekly trips abroad - we've just come back from a weekend down to La Rochelle in France with a couple of aircraft. I've been to many places post-PPL with them.
Visit a couple of places, speak to some people and see what you like and don't like. Then come back when you have decided and let everyone know how you're progressing!
Above all else - enjoy the experience and have fun..