initially built at Hendon but switched to Blackpool later, and in 1966 the Viceroy range replaced the Bella series on most Bedford or Ford chassis. From 1968 Duple coach production was concentrated at Blackpool, and the company was renamed Duple Coachbuilders Limited. The Hendon factory finally closed in 1970. The Willowbrook subsidiary continued in business under its own name until it was sold in 1971. Dominant 1970s At the 1972 Commercial Motor Show, Duple introduced a new range of bodies called the Dominant, which were similar in appearance to the Plaxton Panorama Elite, already in production since 1968. The Plaxton Supreme range was introduced in 1974, and in response Duple introduced the Dominant II in 1976 with a restyled front and rear end by Michelotti of Turin. The style was cleaner than earlier models with rectangular headlamps in an integrated grille panel and a much deeper windscreen and driver's window. The Dominant and Supreme body styles were the ubiquitous British coach of the period, with very little competition other than small numbers from Willowbrook. The thought of importing coach bodies from abroad was only just being considered towards the end of the decade. 1980s The Transport Act 1980 saw the introduction of deregulation of coach services over 30 miles in length. A growing trend towards heavier-duty chassis that had been found more reliable for the high mileage and fast speeds of the motorway, caused the market for light coach chassis from Bedford and Ford to collapse in 1981. Duple's output fell from 1,000 bodies in 1976, to 800 in 1980 and to just over 500 in 1981, which resulted in a reduction in the workforce. In 1980, the Dominant range was extended with the Dominant III and IV, with similar front ends to the Dominant II, but with reduced brightwork and bumpers. The Dominant III had high-set forward-angled trapezoid windows with thick pillars. Features of all four versions could be mixed and matched. In 1981, the Goldliner was introduced. This was similar to the Dominant, but with a higher floor to allow increased luggage accommodation and improved passenger sightseeing. The initial Goldliner styling featured a stepped roof behind the entrance door and was available in Goldliner II, III and IV designations, similar to the those of the Dominant. In 1982, the Super Goldliner was introduced for a fleet of twelve rear-engined Dennis Falcon V coaches developed in conjunction with Dennis