Herc-u-lease -
I completely agree, the RAF should have introduced a LCpl rank for its techs. Army techs are (by and large, but no longer "as of right") granted LCpl rank out of the factory. Cpl follows within a year or two. This is only for techs with long courses, e.g. REME and R SIGNALS techs.
The RAF not doing so has repeated the old bollox where a Flt Sgt claims rank equivalence with a WO2 based upon what his next promotion will take him to.
The one bit where the RAF bloke wins though is where he DOES get promoted, and a Flt Sgt will leapfrog a WO2 to to WO, which IS equivalent to an Army/RM/RN WO1. Thus he is immediately superior to the WO2. The same for SAC(T)s. They become CPLs, and immediately superior to LCpls.
As usual, if the NCO/WO (officers too, for that matter) can't manage men without reference to banana-counting, then he probably shouldn't be in that rank in the first place.