And for completeness, there's also Elstree, North Weald (just outside the M25), and the Tiger Club at Damyns Hall, in addition to all the ones mentioned above.
Which one you choose could also depend on lot on exactly where you are living, as it makes some a lot easier than others to get to.
Also worth considering, is whether you have any plans to do anything like tailwheel, aerobatics, or IR(R), as that could also affect your choices.