Eighty 81 class locomotives were built by Clyde Engineering, Kelso between September 1982 and February 1986, to replace 1950s vintage 42 and 44 class locomotives as well as provide additional capacity.
Eighty 81 class locomotives were constructed by Clyde Engineering, Kelso between September 1982 and February 1986, to replace outdated 42 and 44 class locomotives as well as augment capacity.