|This photograph shows four indications that it was taken towards the end of the war.|
Firstly he wears a collar and tie which was authorised for private soldiers from November 1944.
Secondly he is wearing a GS cap, which was a beret style cap authorised from late 1943.
Thirdly his RASC cap badge is brown plastic; a type introduced from late 1942 as an economy measure . It appears at least 3 times as thick as the brass badge it replaced.
Lastly the back of the photograph suggests it was probably taken in mainland Europe; therefore after D-Day ( 6th June 1944 )