Many gliding clubs (incl. mine) offer a 'Country Membership' where for normally about half the usual fee you can fly a limited number of times a year.
It is intended for non local members who aren't there every weekend and in the case of my club (the best one in the Oxford area!) it's £110 pa for members who live 100+ miles away and limits you to twelve flying days a year.
I've flown at several of your local clubs and these are great clubs, but are commercial organisations offering 7 days a a week facilities which you have to pay for.
Whichever club you fancy, have a trial flight or a mini-course (3 flights) and see how you get on. Winch launch clubs tend to be cheaper obviously so at my club for example, as a member a winch launch costs you £6 and you pay 35p / min for our most expensive club glider. I'm not going to turn this into an advert so PM me if you want more info...
