As I recall, the G-*ORR refered to the family name, MORR was Michael Orr.
Aside from the Squirrels, they had an Aerostar, G-COLT, and either owned or sponsored several hot air balloons.
Owner of the Aerostar was "The Colt Car Company".
Again, if memory serves... they were a sponsor of the Biggin Hill Air Fair around the early 1980s, I seem to remember some of the aircraft there and a car trade stand.
They may also have been the sponsorship of Vic Norman's Zlin 526 and Zlin 50 which had Mitsubishi/Colt sponsorship.