The Volvo B7TL is a low-floor double-decker bus chassis which was launched in 1999 and replaced the 2-axle version of the Volvo Olympian (its 3-axle version was replaced by the Volvo Super Olympian). It was built as the British bus operators seemed hesitant to purchase the B7L double decker with a long rear overhang (although some have since entered service in Glasgow, Scotland as 12 m long double deckers). The B7TL chassis was designed by the Leyland Product Developments consultancy based at the Leyland Technical Centre. It was initially built in Irvine, North Ayrshire, Scotland. In 2000, production was gradually transferred to Sweden. In mid-2004, production of the MkII version of the B7TL was started. Like the Olympian, the B7TL features a transversely-mounted rear engine and a shorter rear overhang, but the radiator was mounted on the right side of the engine compartment. It was equipped with Volvo D7C engine and ZF or Voith gearbox. The B7TL was initially available with Alexander ALX400 and Plaxton President bodywork, later followed by East Lancs Vyking and Myllennium Vyking bodies, and also the Wright Eclipse Gemini. Orders United Kingdom The Volvo B7TL was highly popular in the United Kingdom, with a large number being purchased by most of the major bus groups such as FirstGroup and Arriva. Travel West Midlands, Travel Coventry and Travel Dundee, part of the National Express Group, purchased over 320 B7TLs from 2000 to 2006, a majority of these being built with Alexander ALX400 bodies, while 112 with Wright Eclipse Gemini bodies and 102 with Plaxton President bodies were also delivered. Translink of Northern Ireland also purchased over 150 B7TLs with Alexander ALX400 bodies for its Ulsterbus and Citybus operations between 2001 and 2006, with the first batch of 20 B7TLs delivered in 2001 marking the return of double-decker buses to Belfast for the first time since 1989. The chassis was especially popular in London, with a total of 2,014 Volvo B7TLs being built for London's bus operators, most being bodied with Alexander ALX400, Plaxton President, East Lancs Vyking or Wright Eclipse Gemini bodywork. 790 B7TLs were built for Go-Ahead Group companies London General and London Central, while 378 for Arriva London, 308 for Metroline, 278 for First London and 148 for London United were also built. Transport for London noise regulations would put an end to B7TL orders in 2006, and the type was superseded in London by