introduction of the 1930 Road Traffic Act brought about changes in the bodybuilding sector, which led to a stabilising of the transport industry, established operators feeling secure now that the threat of unregulated competition had been removed by the licensing system. Accordingly, there was a trend towards vehicles with higher standards of finish and more comfortable interiors. In 1930, Duple received the largest single order to date, for 50 bodies to be fitted to the AEC Regal chassis for Green Line Coaches, the newly established express service arm of the London General Omnibus Company. In August 1931, two Bedford passenger chassis (the 14-seat WHB and 20-seat WLB) were announced. Duple had built early bodies on the WLB chassis for the Vauxhall Motors (the parent company of Bedford), and was listed in publicity material as one of the four bodybuilders recommended for the WLB chassis. As demand for the type rose, Duple's ability to produce in quantity set them apart from their competitors, and soon Duple-bodied Bedford WLBs were in service around the country. The association with Bedford was to last over 50 years. In 1932, Duple acquired the business of London Lorries who, despite the name, were heavily involved in the manufacture of coach bodies. By the middle of the 1930s, Duple was widely regarded as a coachbuilder, although bus bodies were still produced in quite large numbers. An order was received from Vauxhall Motors for special sports tourer bodies on Vauxhall 14 hp light six chassis and a stand was taken at the 1933 London Motor Show to display them. They were advertised by Vauxhall up to 1935 and may have been Duple's last car bodies made in quantity, although they also bodied Canadian-assembled Buick 8-50 cars for General Motors in the UK. Also built in the 1930s was a special coupé on an Alvis speed 20 model for Lloyd Thompson of the Holdsworth Moquette company, a major supplier to Duple and many other coachbuilders. Export business had been developed early, based mainly on the travels of the Duple directors, including W. E. Brown, who had already been to the United States and Canada and now embarked on a Mediterranean tour, taking in Greece, Syria and Egypt. Export orders were also received in quantity from East Africa and Argentina, and closer to home in Europe. This in part helped to compensate for the reduced demand for UK bodywork, which