I now remember the guys n gals of 1359 flight who are of course - ex regulars,retained as RAFR to fly the hercs.
They are actually in the RAuxAF along with the few RAuxAF F3 Jockeys that are still around! (All collectively known as Reservist Aircrew)
The RAFR aircrew you may come across away from ACCGS are the Aviaton Officer (AvO) Grades in the RAFR(CC) generally employed in the Flying Training systems as QFI's. More "Civil Servants in Blue suits", but most with quite experienced and/or distinguished regular service backgrounds.