My fellow nav (plotter) on my first Vulcan crew (101 Sqn, 68-70), who had won his DFC and Croix de Guerre avec Palme before I was born, wore an Observer's brevet on his mess kit. He was also a very " nice, if slightly old-fashioned" chap.
IIRC Gaydon's CO IN 1966, Group Captain King, retired from the service to be ordained as a priest in the Church of England.