Tempie,
Good try. It isn't Seletar though. However, I like your thinking. This was a 205squadron Sunderland, which spent a lot of time after the Japanese surrender flying between Seletar and Sri Lanka/India repatriating British POWs from Changi, when the MOs deemed them well enough to travel. They continued home from India by ship.
Now back to this photo: the airfield is on the list, so if seeing it again offends anyone, then I apologise. At the time this Sunderland was photographed however, the present runway did not exist.
Off to work,
BSD.