Go and have a chat with your local gliding club. Try the british gliding assosciation website and yo'll find your nearest club. Not all clubs require 'gliding' experience, some are quite happy to take ppl pilots. Ours for example has 12 tug pilots, of that only 4 are glider pilots/experienced glider pilots(myself included). Gliding experience certainly helps but not all clubs see it as a necessity. You will need to 'muck in' however, be there from 9 -5, clean the aeroplane etc. Gliding is a real 'club' activity and you need to be part of the team.