Numbers 1 and 2 headstocks at the former Hatfield Main Colliery

The building consists of two sets of colliery headstocks from 1922, with later alterations. The headstocks are arranged parallel to each other, with the two shafts located approximately 75 meters apart, both wound from the northwest.

The first headstock, located to the west and serving as the upcast shaft for primary coal drawing, is made of steel lattice beams reinforced with steel plates at the junctions, all resting on a concrete raft foundation. The lower 6 to 7 meters of the main legs above the shaft are encased in concrete, showing signs of a removed upper landing. The feet of the backstays are also encased in concrete, which is believed to be part of the original design. This headstock reaches a height of 105 feet (approximately 32 meters) to the pit-wheel axles, with the two pit wheels each measuring 20 feet (approximately 6 meters) in diameter.

The second headstock, located to the east and serving as the downcast shaft for primary man-riding, is constructed using the Kahn system of steel reinforced concrete. The tower above the shaft has concrete sides. Surrounding the base of the headstocks is a two-storey heapstead made of concrete framing and brick panels, which is lined internally with shuttered concrete for airtightness. The heapstead was rebuilt in the 1970s, although the concrete framing appears newer than that of the backstays. Photographs from 1922 indicate that the arrangement of the framing has changed little. The main entrance to the heapstead is located to the west, accessed through twin airlocks with steel doors, and is approached by two 24-inch gauge lines for mine tubs. This headstock rises to nearly 107 feet (approximately 37 meters) to the pit-wheel axles, with the two pit wheels also measuring 20 feet (approximately 6 meters) in diameter.

Certain structures beyond the blue line on the attached map are not included as part of the listed building, such as the heapsteads, fan house, powerhouse, and winding engine houses.