I completed my PPL there in 2009 and still fly from Elstree. I think it's improved a lot in the last couple of years and I'd say if you learn there you'll be pretty comfortable flying to most other places. I chose it because it was nearest where I live and that's probably a big factor that will determine how much you can fly. Perhaps take a trial lesson and see what you think - you can log the time towards your PPL.