Of course, those that retire before their Normal Retirment Date (NRD) will automatically join the Regular Reserve of the Royal Air Force up to age 55 (or even later depending on when you joined and what rank you attained). JSP516 contains the details.
When the RAF Retired List was binned then the RAF lost an instant access record to work out who was a Regular Reserve. I think the easiest way to show someone what liability they have remaining as a Regular Reserve would be to issue a MoD90 (F1250 in new money) with an expiry date for the end of your liability period. Then they could enjoy access to the RAF whilst they remain a Regular Reserve, once that period is over, then they become a Veteran. Then the RAFA's Retired Service Card should be used -
https://www.rafa.org.uk/members/memb...d-service-card
It should be so easy to sort out, but as ever our scribblies are too busy trying to scr3w the rest of us left to sort out anything useful...
LJ