Ruston & Hornsby (Lincoln)

Ruston & Hornsby was a British industrial engineering firm formed in 1918 by the merger of Ruston, Proctor & Co. of Lincoln and Richard Hornsby & Sons of Grantham. The firm operated principally from a large works in Lincoln and was for many decades one of the leading British suppliers of small industrial diesel locomotives.

The firm's locomotive products covered colliery, factory, dockyard and light-industrial railway use across Britain and the Commonwealth from the 1930s to the 1960s, chiefly the LB, 88DS and 165DS classes of small four-wheel diesel shunters. Many Ruston & Hornsby diesels survive today in industrial preservation.

The firm was acquired by English Electric in 1969, and the locomotive business was eventually wound down through the 1970s. The Lincoln site continued in business as a gas-turbine manufacturer (today Siemens Energy).