I did my training with soloflight a few years ago and I still recommend them to friends. Their aircraft tend to be well loved and the PA28 is much more comfortable than a C152 and not that much more to hire. Learning to fly from "proper" airport means you have a bigger runway and better facilities to start with, however Humberside is not too busy but you occasionaly get kept at the hold (not as bad as Cranfield... 25 mins watching the hobbs tick round).
Beverly's handy for you alot less hassle plenty of room to learn to fly but with limited Radio work.
Sherburn is between the two, a choice of runways and more of a club atmosphere.
RE speed of getting your licence, is it important ?are you going to go further ie cpl or is just for fun.If its just for fun then it doesnt matter how long you take. Some of best flights were during my training because every flight had a purpose.
What sort of flying do want to do when you've got your licence?