Well what a fascinating photo! It's Changi and must indeed be immediately post war and the lack of any visible aircraft show it was before the RAF were using it. It's taken from the south east and what it interesting is how wide the runways look in relation to the recognisable features. The RAF layed PSP; pierced (or is it perforated? ) steel plate on the main north / south runway and relegated the east west one to parking areas, becoming the Eastern and Western dispersals.The dispersals also gained large areas of PSP, which lasted until 1964. The 02/20 main runway was sinking so it was relayed with concrete and had storm drains constucted down it's length and these appear to be areas that this photo shows had been covered in concrete by the Japanese. You wouldn't have known that in the early 60's when I knew it as grass covered the ground between runway and taxiways.
David Taylor.