Of the top of my head, from where you are, use the internet and look at clubs and schools (they are not quite the same thing although both will teach you to fly) at Redhill, Damyns Hall, Stapleford, North Weald, Biggin Hill Panshanger, Elstree, Denham, Helnlow, Blackbushe, Fairoaks, Wycombe and White Waltham.
That list is fantastic, thanks a lot for that mate!
Choice of aircraft: will you be happy to fly two seaters, in daytimes and fine weather only? In which case you can use what are loosely called microlights and VLA (either three axis or weight shift, sorry, you will have to research all this!); if you want more seats and / or more flexibility you need conventional light aircraft.
I don't quite follow this statement - do you mean that certain schools will be able to provide proper, four seater planes while others only 2-seater and I should not even bother with those?