I was at RAE Farnborough from '83 to '85. From my logbook the Devons there were:
XG 496 VP 959 XM 223 and VP 975. When possible we used to assist Transport Flight with the coms flying - known in the trade as 'guest artists'. It was possible to do the early Bedford run and be back in the office by 0900 in time for whatever the day held. The Devons were replaced by Chieftains just as I completed my tour.