Hi Paul,
Search for 'Salamanca' in the pprune toolbar and you'll find some posts with contributors from 230 Sqn around the time your Dad was serving, as well as some good background stuff on the life out there.
There may also be some old multi-engine drivers around from the sixties who might have known him before he went helos.
What about placing a new thread asking for info, as the truckies out there might not click on a helicopter thread.
Regards and good luck,
SFF