Midlander was built by Ruston and Hornsby in 1940, and worked at Jee's Quarry in Hartshill, England until it was purchased by the Talyllyn Railway in 1957. In 1980, Midlander returned to service after being extensively rebuilt. Midlander is used for maintenance work and other odd jobs on the railway, similar to its Sudrian counterpart.
Rusty is based on Midlander's pre-1980 shape.
Midlander is painted forest green with white lining. It carries the Talyllyn Railway's crest on its sides, and a black nameplate with its name written on in gold writing. It also has the word "Ruston" painted on its front end in white.