Originally Posted by
NutLoose
The reason being RAF dress tended not to be worn by RAF troops in WW2 Europe, as colour wise it could get you mixed up with the German side and shot at by allied troops, so Army uniforms were preferred.
Nutty
I think WB627 was referring to the difference in breast pockets. The sergeant third from the right (looking at the photo) has a pocket minus the blouse. According to Wiki this was an austerity measure introduced in 1942.
regards
Batco