The Link started on 9th June 1978 and the last flight was on 6th February 1986. I can't find the info about the Islander.
One of the Heathrow ATCOs got a ride in the Link one day and there were no fare-paying pax so he was invited up front and allowed to fly it. When he left the flight deck after landing the stewardess accusingly said: "It was you flying it, wasn't it?" How could she have known.....?