Nice photos.
RAF? Is it part of the Airforce? If so, what role does it have?
Its part of the RAF GSA (Gliding and Soaring Association), which is basically the RAF's own well funded gliding club (as opposed to its Volunteer Gliding Schools, who fly ATC cadets in military serialled gliders). It flys mainly for RAF/MOD airfields but i believe member ship may well be open to civilians as well as serving personnel.