Response to Ben
Ben I am in same situation as you, I left the Air Cadets because the Squadron was run poorly and we (as a squadron) did not do a great deal. This was 2 years ago when I left.
Just last week i visited the AFCO for the first time as i too wish to become a fighter pilot, and i asked the seargent at the AFCO if me leaving the air cadets was a hinderence to my application and thankfully it is not. Secondly I also neither have a job (at the moment) or do many outdoor pursuits, but since my visit I now plan to help in conservation work and set up a badminton club at my 6th form. - Hope that helps a bit.
I also need help, I am just about to start my second year at 6th form and need help in deciding whether I need to study a degree at Uni. The seargent at the AFCO said it would not hinder me in OASC but I am not so sure. Any help greatly appreciated. - Rob