Many moons ago I sat on a Cpl to Sgt promotion board for A Tech A and A Tech P as well as Super techs with both annotations.
I remember vividly one particular guy who spent his spare time flying; started off with gliding and had moved to fixed wing when he could afford it. My opinion was "Promote him". The 2 blunties wanted to know why. Answer - "This is the Royal AIR Force, not ground force".
He got his promotion.