Double-decker bus
The first commercial horse-drawn double-decker omnibuses were introduced in England in 1847 by Adams & Co. of Fairfield, Bow, then improved upon by John Greenwood, who introduced a new double-decker in 1852.
History of Dundee
The first trolleybuses in Scotland were introduced along Clepington Road in Dundee during 1912–1914. However, motor buses were gradually introduced from 1921 to supplement the tram system, and double-decker buses appeared ten years later. Electric-powered operated by "Dundee Corporation Electricity Works" were still used in parts of the city until 1961. In 1975, Dundee Corporation Transport became part of the new Tayside Regional Council. Tayside adopted a new dark blue, white and light blue livery for its buses, replacing the former dark green. The Volvo Ailsa double deck bus became standard in the Tayside fleet during the 1970s and 1980s. In 1986, following bus deregulation, Tayside Buses was formed as a separate company. It was later privatised and bought out by National Express and now trades as Xplore Dundee.