I have a lady friend who used to work for Channel Airways. Mostly on Viscounts, and then 1-11s. With STN having been 'my' local airport for donkeys years, Channel was very much a part of my budding interest in cicil aviation. I can remember my Dad taking me to STN, on a day when it was possible for the public to tour the interior of one of their Tridents. There may well have been another aircraft open too, but I can't be sure, a 1-11 perhaps? I agree with your views about Arnie, one of the old school.
"Behold! The Wings of Horus"