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.
Did some research once for a staff ride to Normandy and found an account of an RAF Cpl radio operator who was sent with the US troops to Omaha beach.
When he went ashore (in a blue RAF battledress) he found that he was being shot at from the front by the Germans, and from the rear by US troops from the other landing craft who weren't expecting someone in a blue/grey uniform on the beach to be friendly.