And no one on the planet has ever met an RAF WO1 as there's no such thing. (Although apparently QRs say otherwise)
There is no "apparently"..
QRs states that 'Master Aircrew' and 'Warrant Officer' are 'warrant officers'. Not 'WO1's or 'Warrant Officers First Class' - just 'warrant officers'.
Unfortunately, QRs (all three, RN, Army and RAF) also state that in the British "Military" (quote) they are WO1s ('Warrant Officers First Class'). In my view that's a very obvious mistake common to all three and they should equally very obviously say "Army", not "military", but ... well ... that's undeniably what they all say and the RAF are, at least technically, in the 'military'.
Hopefully (although TBH I doubt it) that may clarify any remaining confusion over RAF warrant officers (small 'w' and 'o', as in para 125 (1): "the expression "warrant officer" is used in its generic sense, ie, as including airmen of ground trades who hold the rank title of warrant officer and non-commissioned aircrew who hold master aircrew titles."