The Dominator was conceived as a competitor to the Daimler Fleetline and initially customers were generally those who had previously taken double-deck Fleetlines, however the largest component of the all-single deck Darlington Corporation fleet was the single-deck Fleetline SRG6, the rest of its parc in 1977 consisted of 1967 Daimler Roadliners, new Leyland Leopards and 1974 Seddon Pennine RU. So, in 1978, it ordered a single-deck version of the Dominator with an extended-wheelbase, designed for 11-metre coachwork, this was bodied by Marshall and the style, dual door with 46 seats, when exhibited on the Dennis stand at the 1978 Motor Show at the National Exhibition Centre was named Camair 80.