I'm in a similar situation as you. The options I've found so far are non-equity groups, (where you pay a monthly fee for insurance/ parking/ maintenance etc. and then between £50 - £100 per hour, depending on the aircraft) lease hire (check big red kite, £45 per hour dry for a 152), and going abroad.
Maybe your best bet would be to save up and take a few holidays a year to places where you can hire cheaply. It depends on how often you would like to fly. Otherwise maybe check if there are any local non-equity groups available.