Link

Britain from above is a new site with aerial photos from the 1919-1953 era. Seems to have a lot of potential although it needs some tuning to speed up the searches :) Nothing much from my part of Northumberland on it yet, but there are some interesting views of Newcastle-upon-Tyne among its 16000 pictures. Had to resort to using it on the laptop as the click on the map is not functional on the ipad.