The Yorkshire Engine Company produced steam locomotives (from 1866) and was acquired by United Steels in 1948 to produce industrial locomotives. The company switched to production of diesel shunters shortly afterwards and was closed in 1965 (http://www.topforge.co.uk/Other%20Industries/Yorkshire%20Engine.htm). Most of the buildings associated with the works have now been cleared and the site is awaiting redevelopment hence there is only fragmentary legibility of this former use. However, the railway lines between the former buildings are used by the South Yorkshire Railway Preservation Society.