British Rail Class 142 DMMU Train Working Instructions manual, for RMT / ASLEF workers and drivers. Driving and maintaining trains & TOC rolling stock

The British Rail Class 142 is a class of Pacer diesel multiple-unit passenger trains used in the United Kingdom. 96 units were built by BREL in Derby between 1985 and 1987. They were a development of the earlier Class 141 which were introduced in 1984. They were initially built for use on rural branch lines. However, as of April 2015 they are mainly used on busy commuter routes in the major cities in the north of England, with some also in use on local services around Cardiff. Until 2009, they also operated in Devon, by First Great Western.