Found this interesting main pic from the battle for the bridge at Arnhem its not the chap in the fore ground;
"Captain John Killick of the 89th Field Security Section on the streets of Arnhem 18th September 1944, with a German prisoner".
Rather A) The arrogant look of their German prisoner
B) The sten in the back ground appears to have a fore grip on it, they all have their bayonets fitted.
Just wondering was the fore grip introduced or was this a field modification not officially adopted by the MoD.
I know special forces customise their rigs to suit themselves just wondering if the practice was apparent in WWII.