PRO at Scampton was, for a while, a Reservist by the name of Howard Leader. At the time, he was a Flt Lt, but I understand he was promoted to become Sqn Ldr Leader. Or just Sqn Leader...
At Lyneham in the late 90s there was a rafp Sgt. Sergeant - also renown for his (lack of) sense of humour.
In the same era there was a Flt Lt Tennant.
There was a Flt Lt Leader but not sure
if he got promoted and whether he made it back to Lyneham in that rank.