Many years ago I was OC 1811 (Marlow) Sqdn so not too far away from Beaconsfield. Our parent station was RAF High Wycombe and we sometimes got 'guest' speakers from there so you might try to contact the ACLO there.
By the way, were you aware that Wilton Park was almost an airfield in 1942 but for certain reasons, it was built as an interrogation centre instead? There were also plans for an airfield at Holtspur but they were cancelled.