The story
The company was founded by Arthur Dorman and Albert de Lande Long when they acquired West Marsh Iron Works in 1875. In the 1920s, Dorman Long took over the concerns of Bell Brothers and Bolckow and Vaughan, and diversified into the construction of bridges.
Between 1923 and 1960, the company owned and operated multiple collieries in County Durham.
In 1938, Ellis Hunter took over as Managing Director and he continued to lead the business until 1961.
In 1967, Dorman Long was nationalised, along with 13 other British steel-making firms, becoming subsumed into the government-owned British Steel Corporation. In 1982, Redpath Dorman Long, the engineering part of the business, was acquired by Trafalgar House which, in 1990, merged it into the Cleveland Bridge & Engineering Company in Darlington.
From Wikipedia’s article on Dorman Long, shared under CC BY-SA 4.0.4