10 remained in the driver training fleet until March 2010. Another significant operator of Leyland Lynxes were Caldaire Group companies West Riding and Yorkshire Woollen. The companies purchased 129 Mk1 and Mk2 Lynxes new or second-hand until late 1991, replacing former National Bus Company vehicles as part of a yearly fleet replacement programme. Other Caldaire Group operators who purchased Leyland Lynxes included Tees & District and United Automobile Services, while elsewhere in the North East of England, Cleveland Transit, Busways Travel Services and Go-Ahead Northern also took delivery of Lynxes. Other operators of Leyland Lynxes included municipally-owned operators Lothian Regional Transport, who in 1991, took delivery of twelve Lynxes uniquely built with dual doors, Isle of Man Transport, who took delivery of two Lynxes in 1989, and Nottingham City Transport. Lynxes were also ordered by former municipals and National Bus Company subsidiaries such as Brighton Transport, Boro'line Maidstone and Merthyr Tydfil Transport. The AJS Group also purchased Lynxes for its Harrogate & District and Keighley & District operations. The last two Lynxes to roll off the production line entered service with Halton Transport in August 1992. The Lynx was the core of Halton Transport's fleet for over 10 years; the company was the first municipal operator to order Lynxes and took delivery of the first Mk2 Lynx in 1990, with the operator owning a total of 36 Lynxes at the end of production. In later life at Halton, they were used on a number of school contracts and the occasional regular service. In October 2010, all of Halton's remaining Lynxes were sold, the last Lynx produced going into preservation, with the penultimate Lynx used to donate spares. Following the takeover of Leyland by Volvo in March 1988, the Lynx was superseded by the Volvo B10B in 1992. Total production of Lynxes was approximately 1,060 vehicles, including six prototypes (one of which was not bodied) and several development vehicles. About 140 of the total were Lynx Mark IIs. Exports A small number of Lynxes were exported as demonstrators, but no sales ever resulted. In 1984, a framed chassis was sent to Australia. After being completed by JW Bolton in Perth, it operated for Transperth, ACTION and Hornibrook Bus Lines before being sold to Lever Coachlines in 1987. In 1989, two were bodied by Pressed Metal Corporation as demonstrators for the State Transit Authority, but the trial never occurred and they were