surely not:
Brymon leased Shorts 330 G-BKDO from Shorts between June and September 1985. It was indeed on a LGW-BHX route that I flew on it, 3 July 1985. It had BRITISH CALEDONIAN COMMUTER SERVICE titles and (in my opinion) was closer to BCAL's colours than those of Brymon.
I found a photo and am trying to link it on here.
http://www.jetphotos.net/photolink.php?id=7587909