To add to the list - Centreline (HG) with Bandit/s. Went up north somewhere, possibly Glasgow.
There was also a P68 that did a run to Brussels I think most nights, often flown by very young pilots. Fixed-pitch props and welded gear, well suited to the recently-qualified.
And an Islander that went to Manchester, or was that Euroair? Long time ago...
And Air Continental's designator was CW.