Great pictures! In the third one there is a BAC 1-11 behind the Viscount. Looks familiar but I can’t think of what it is. Can anyone tell me? BMA?

Not BMA, but BUA….and looking closely at the original slide, its actually the nattily named Caledonian/BUA ie post merger, but before being renamed BCAL. BUA/BCAL operated a GLA-NCL-AMS service for years.
And finally, a pic of the origins of Gill.

Some more from the mists of time….best military visitors in the 70s were the Belgian Air Force C-119s, that came in, usually about six at a time, presumably bringing troops in to the Otterburn training area – never got a shot of them, so a Pembroke will have to do.

And a few 70s turboprops…

The end of Northeast – they were formerly BKS, became part of the British Air Services group (including Cambrian), and eventually rolled up into the ‘new’ British Airways (along with BEA & BOAC)

Some early 1970s visitors, and one unintentional resident – the Dan Air Comet G-APDL, did a wheels up landing during crew training and was eventually scrapped.