I thought it was the late Jan Beers of Jan Beers Aviation who ran the Halls Ck - Newman - Perth - return in a Be58 Baron.
I understood it was 'established' so that he could change aircraft / crews - and carry pass. / freight to minimise losses on flight...
Mind you, 'twas a while ago...like about '83 - '85 when I was stationed in Derby FSU...
Please feel free to correct me...
Did GWA take it on later?? And can you pls advise acft type used?
I do remember GWA, but for charters ex Perth.
Cheers