BBadanov:
Before my QWI days the qualification had been developed from the merging of several streams. I think in the RN it was the AWI (?) and in the RAF the FAI (?). Something like this.
The RN (FAA) certainly used to have the letters AWI (my father was one back in the day). The lack of current fixed wing may have changed that..........I'm sure somebody with more knowedge will come back with an answer.
TN.