I'm sorry that I didn't see this thread in time to join you... having been brought up in Heston, and now living within spitting distance of Hanworth Air Park.. (close enough that my house has a covenant on it preventing me from building too high, due to aircraft)
I will have to visit Hounslow library (ahhh, my first saturday job was there) and buy the book, to accompany my little blue book about Heston Aerodrome, and my pictorial history of Feltham and Hanworth which has quite a few pictures of the airfield.
I am always keen to find out more about Heston and Hanworth, so if anyone has anything else....
Gents, on your meanderings across the Air Park, one trusts that you found the pill box and the large concrete slab (which I believe was a gun placement) I am also reliably informed that on a hot day you can see the outlines of the runways in the grass....
Chips