The Laycock Engineering Company Limited of Archer Road, Millhouses, Sheffield, Yorkshire, England was an engineering business established in 1884 by W S Laycock which made small and major components for railway rolling stock. In 1966 Birfield, with Laycock and Hardy Spicer, were bought by the GKN group which was entering the automotive components field following government's announcement of the intended nationalisation of its GKN Steel.