The Nuclear Bunker may have been installed by the new owners, the Army.
Just to "Belay that last pipe" as they say in the Navy.
I was talking to an old friend last night about this "buried aircraft" nonsense and he told me that as a kid he used to play on a Lanc that had crashed at Kenley. He believes that it was buried along with a spit.
If anyone wants to contact him PM me.