When I was retired, my letter from Gloucester gave me permission to use the title Flt Lt RAFVR(T) Retd., never done so; if I ever did (unlikely) I would make sure I added the VR(T) bit out of respect for you full timers. That said, I bet some ex VR(T) officers 'forget' to add it. They're probably the ones who also enjoy posing in No 5s if they ever go to a formal dinner! Of course, not all ex Flt Lt (Actings) are given this privilege; we're really only Fg Offs after all and you're only allowed to retain acting rank if you've given recognisably good service.