Airshow FM
Vim
When I was at Waddo a few years back, Airshow FM was run and equipped by Lincs FM (or may have been BBC Lincolnshire), so any royalties were paid for that way. They saved money by using volunteer DJs (a guy from the Waddo Kart club was one)
That way, you have broadcasters who at least have some knowledge of what's going on rather than the usual coverage of all things military.