QR770 was re-numbered to QRJ727 when QRs were re-written. However it basically states:
The term "flying badge" is used to include all badges worn by personnel who have successfully completed a prescribed course of flying training. The initial award of a flying badge is on a provisional basis. It is not deemed to be fully earned until the holder has successfully completed an operational conversion or equivalent course and has joined an operational or nonoperational unit in the capacity for which the provisional badge has been awarded.
So if you “successfully completed” the “prescribed course of flying training” for Pilots then you were awarded the Pilot’s Flying Badge. If you did so as a Navigator, then you got the Navigator’s Flying Badge. Etc...etc... The versions of Flying Badges are described in my previous post which is QR206:
206. Flying Badges - wearing of.
Flying badges are divided into two categories, those in current issue, for which aircrew are qualified under the terms of paras J727 and 728 and those no longer issued, for which members of the RAF qualified under regulations in force from time to time.
These badges are:
(a) Current issued: Pilot, Weapons Systems Officer (WSO), Weapons Systems Operator (WSOp), Fighter Controller (FC), Airborne Technician (AT), The Preliminary Flying Badge (Pilot), UAS personnel only. See para 728.
(b) Previously in issue: Navigator(N), Air Electronics Officer(AE), Air Electronics Operator(AE), Air Engineer(E), Air Signaller(S), Air Loadmaster(LM), Air Observer (O), Air Bomber (B), Wireless Operator (air) (S), Wireless Operator Mechanic (air) (S), Meteorological Air Observer (M), Observer (radio) (RO), Air Gunner (AG), The Preliminary Flying Badge (Navigator), The Preliminary Flying Badge (Signaller), The Preliminary Flying Badge (Engineer), The Preliminary Flying Badge (Gunner)