Arclite01 mentioned Mike Throssell from ACCGS.
Since this is Pprune, I can be fairly confident that said ACCGS examiner will not be reading these pages. He, and one other I met, had an aversion to (civilian) professional pilots! My CO had to put the bloke back in his cage!
I think the problem was the pay differential between the Civil Service (which he was), and the airline business. Never mind that we CGIs were giving up our weekends to instruct, and asking for weekends off totally f***** up your whole roster.
Everyone else at ACCGS were brilliant instructors and great guys to be with. They taught me a lot, especially Peter Bullivant, who did my 'C' Cat course. What a great bloke. Still sad he's gone.