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.
From my point of view, close to home is important. Flying (and the associated hanging around) is expensive and time consuming enough without long trips to and from the airfield. Also, does the school / club have enough of the right kind of aeroplanes and instructors for you? You are going to spend a lot of time with both so need to be happy with them. I have been lucky and consider most of the instructors I have flown with now to be friends. Some places are very loosely organised, some are tightly organised. It is up to you which suits you best.
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.
Referring to Grob Queen's post. I learnt to fly at Halton and am still there after nearly five years so I recommend it.