You can explore over 400,000 digitized photos online from over 6 million aerial photographs preserved in the Historic England Archive.
The latest addition is a USAAF collection of over 20,000 photographs that record airfields, military bases, towns, and countryside in England between 1943 and 1944. An interactive map gives access to over 3,600 photographs from the USAAF Collection. These can also be viewed on the larger Historic England Aerial Photo Explorer map.