First depicted in its present form on 1955 OS plan SK 3892SE this large steel mill is housed in very large shed buildings. The complex has developed in a piecemeal fashion from the first buildings (at the north of the complex) dating to around 1925, with southward expansion across the floor of the Blackburn valley by 1955. During this building work the Blackburn Brook was canalised in a channel to the north west of the works. The plant produces thin strip products in stainless steel. No legibility of earlier landscape types. Expansion of the plant has been contained within boundaries produced by the track bed of the former South Yorkshire Railway to the north (now a long distance bridleway) and the Sheffield - Barnsley railway line to the south.