Wigan I am responding here in anticipation of further linkages which may well steer us further away from the Mann theme.
Well done on your research regarding Western Air. Its intriguing because there seem to be so many of these firms which one has never heard of before. All relative of course.
WOSP has appeared several times on this thread, initially on page 4 where she is barely visible behind a Gleneagles 206 being wheeled-out to launch by an army of ground-handlers in Rhodesia (now Zimbabwe). The same image can be seen in post #756 above.
PPRuNe member Paco spent some time flying WOSP and he may have an idea as to the history behind Western. Have there been many Glasgow-based helicopter operators that you know of over the years?
Another shot of WOSP. She was one of the first 206 III's in the UK:
Burnthills operated B206B III G-WOSP at the Strathallan Airshow in Auchterarder on 8th July 1984 (Photo: Alec MacKellaig)