The URL below should take you to a navigational aid whereby you can move around Sussex using the up/down and left/right arrows in the blue border of the map. Once you are close to the desired town, click on the nearest green aeroplane shape and you should see a 1946/7 aerial photo of that area.
Alternatively you can select the town by using the seach box in the top right and then clicking on the nearest green aeroplane. It can take a few attempts to get to the correct town/village.
www.geog.sussex.ac.uk/grc/info/airphotos-historic/1940/index.html?ZOOM=e+GPSX=531500+GPSY=106500
