WW11 RAF Airfields
You can find very good wartime aerial photos of RAF and USAAF airfields in Britain in the following "After the Battle" books:
The Battle of Britain Then and Now.
Bases of Bomber Command Then and Now.
Airfields of the Eighth Then and Now.
UK Airfields of the Ninth Then and Now.
Look for them on Amazon. They're pricey but worth it.
Polecat