JTO
Good points. I do believe that all Officer Aircrew promote to Flt Lt earlier than some of their ground branch colleagues, but that probably doesn’t offset for the earlier promotion to Sqn Ldr by some the ground branches. Also, promotion to Wg Cdr and above is way more open to Aircrew than to some ground branches. So it may just all ‘even out’ in the wash - but I suspect that is more by luck than by design!