piperarcher
I think that you will find that it is one son. While he had an interest in aviation after a wheels up landing (which i witnessed), and possibly another, he appeared to lose interest.
Used to work for Nat, not the easiest of bosses, but was fair. Loved his flying, I spent many hours with him in his Aztec and later Navajo. Had a great way of doing things, straight lined it every time. After buying Southampton he bought Halfpenny Green, the latter he knocked into business shape and sold on. Remember a trip up there from Southampton, airborne, climb, direct track, wasn't bothered about something called "Green 1"!
Shame about Panshanger, what next Wellesbourne?