I would like to add my congratulations to Nikki on gaining command of a FJ Sqn. I would, however, point out that the Dominie was both a jet and quite fast. Therefore Wg Cdr Suraya Marshall as OC 55(R) Sqn was the first female OC of a fj Sqn. I would also add that she was the first female real QWI (Air Defence).
As JAJ states the Navs and WSOs wear the brevet that they gained. I do recall that at the into of WSOs the AFB tried to encourage Navs to wear the WSO brevet. It was even rumoured that non compliance may affect careers, a bit like wearing the wrong wooly pully!