GAMPZ used to be part of the original Eastern Airways in the 70s and 80s, based at Humberside Airport, mostly doing charters UK and Europe wide.
It did the first Humberside - Heathrow sheduled service, quite a moment as we taxied in and were parked next to a B.A Concorde, it was even better to see all the BA Engineers bring out their apprentices to show them what a real aeroplane looked like!