Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Leyland National is a British single-deck bus built in large quantities between 1972 and 1985. It was developed as a joint project between two UK nationalised industries - the National Bus Company and British Leyland. Buses were constructed at a specially built factory at the Lillyhall Industrial Estate, Workington, Cumbria. It was built with the intention to replace all the single-deckers offered by British Leyland, including AEC Swift, Bristol RE, single-deck Daimler Fleetline, Daimler Roadliner and Leyland Panther. The Leyland National was built with integral, modular construction and a rear engine. All components were designed for ease of construction and replacement. Until 1978, it was always built with a distinctive roof mounted pod at the rear, housing the heating equipment, which consequently blew warm air out at roof level. At first the pod was almost the length of a bay and appeared designed to give a Trans-Atlantic feel. In 1974 a new shorter version of the roof pod was introduced.