I too used to go to Bovingdon as an Air Cadet, I was in 1187 sdn in Hemel Hempstead and the school i went to was right under the final approach flight path, which made for an interesting day. Yes I used to bunk off school to get trips up in the Ansons and also got in to see The War Lover being filmed. Also used to hitch hike to Booker to get trips too .
Many years ago I had a map with all RAF airfields on it but lost over the years . Used to stand on the Chesham -Hemel road right under the flight path as the B-17,s were landing. So in Jan 63 I became a Boy Entrant, 48th entry at RAF Hereford and many years later worked at Gatwick Airport as a head loader.