Hello pfFredd, the areas you've listed cover quite a bit of the UK.
In Essex there is North Weald and Andrewsfield. Southend is a larger airport but has a nice aero club or two. Nearer to London is Stapleford, another good place to learn from.
I don't think there is much near Bath but I'm sure someone will come along and correct me.
Barton is near Manchester, I don't know what the situation is like there.