Can only comment on Headcorn.
Weald Air Services. Nice people. Relaxed but professional. Good rates. Free internet access for weather etc. Reasonable range of aircraft - C152s, C172s, PA28s (Warriors), and DR400s.
Headcorn airfield is busy on weekends and the grass strip is fairly narrow and not too long! Personally, I think this is a plus. Better to get to to grips with this early, rather than learn on an "easy" airfield with next to no traffic, and never land away after your PPL for fear of short grass strips
. BTW, Rochester is, if anything, more challenging.
Tiger Club. Not sure I can recommend it for beginners. The Cub, Tigers and CAP10 don't have Nav Instrumentation (other than the compass
). You'll have to get to grips with tailwheel straightaway (not that big a deal, but an extra hurdle). I've always seen it as the next step from PPL for those interested in tailwheel flying, biplanes and aeros. Which is precisely what I did: got my PPL at WAS, then moved on to the Tiger Club.
If you want some views on instructors - feel free to PM
Cheers