A little after WW2 but I am sure they were about at that time. This pic is taken from a Pathe News clip (Paras in the Desert) taken in Canal Zone 1952. The men a part of a mixed unit group watching parachute ground training demonstration. Any body identify cap badge?
99.9% certain you're both right. There's a better example a bit further into the video. Early RAF Regt cap badge: Tim
Thanks I am sure you are all right ,must be the" lock in" my brain would not shift off Engineers ,and why didn't I think of the Rock Apes!