In the early eighties there was a company called Air Continental running Navajo Cheiftains and Kingair 100's on newspaper runs every night. They certainly went to Geneva ( Navajo reg G-NEVA ) and Leuchars in Scotland on each weekday night. Their offices were between the Flying Club hangar and the Helicopters hangar and one of the pilots flying for Air Continental is now the owner of Titan Airways at Stansted. If my memory serves me right I think the owner also set up the company "TrafficMaster" in one of the units on the old Vauxhall training site.