There seems to be a tranche of money which has been made available for Air Cadets to fly with RAFGSA clubs (maybe BGA clubs too?). The Kestrel Gliding Club at Odiham has certainly flow a fair number of cadets over the summer, which has resulted in up to a 50% increase in the number of launches per day.
A parent/guardian signature is required on the club's paperwork for under 18 year olds, so cadets will be disappointed if they just turn up on the day without making contact in advance.