The whole greatcoat issue is half-done.
We are told by the man who edits AP 1358C that the RAFAC pins are to be worn on the collar. Though, it’s not been properly written into our regulations, and that is not the traditional RAF location for such pins…
When the Auggies wore “A” distinguishing badges Officers wore gilt metal “A” through the rank braid on the shoulder straps (the same way ours used to wear VR(T) badges through the braid); WOs wore embroidered “A” on the lower sleeve, immediately below the WO or Macr rank badge; and other ranks wore embroidered “A” on the upper arm 1/4" below the Eagle badges.
WOs and Other ranks wore the embroidered badges in those positions on No 1 too… Not gilt badges on the collar like we do.