The Dennis Dominator was Dennis's first rear-engined double-decker bus chassis, it was launched in 1977. Dennis had been absent from the bus manufacturing market since the last Lolines were produced in 1967. The Dominator was described as bespoke, with numerous options. To some extent it was considered a successor to the Daimler/Leyland Fleetline. The Dominator was different from the Fleetline in that the radiator was located at the front instead of the offside of the engine compartment.