With evidence of "Cap Ridiculous", open collar and tie (deffo!!) and lack of web anklets or any other war fighting kit around, I would put this around winter 1945. I dont think it would be any earlier than winter 1944, and it is deffo in foreign climes....

It could be that his kit is already on the wagons, and he is off home to be demobbed!
Have you got hs service records from the Veterans Agency?