Was one of the main aircraft repair factories during WW2. I have a book
somewhere called "Sigh for a Merlin" by the chief testpilot of the place
about his exploits there.
He had the reputation for being able to land anywhere in any visibility
gained with the assistance of (the now demolished) Hams Hall Power Station.
However bad the cloud conditions were, he only had to find the plume of
water vapour rising from the cooling towers to know EXACTLY where to put the
aircraft down safely!
The site was earmarked for residential development before the end of the
war, but the flight preparation shed at the far NE(??) corner of the field
was not demolished until about 10y ago.