Threshing Barn and Granary, Leighton Farm

The Threshing Barn and Granary at Leighton Farm is a Grade II* listed building. It features a Threshing Barn with a Granary on the north side, positioned above the western and eastern ranges of Stockyards I and II. The Granary extends north over the farm road towards the Mill and includes an eastern wing that runs at right angles to the main range of the Granary, with an outshut attached to the Tank House. The structure is built of brick with slate roofs, and it has coped gables on moulded kneelers.

The Threshing Barn is characterized by stepped diagonal buttresses. It has tall round-headed doorways with stone imposts in both the eastern and western gable ends, each featuring a bullseye opening above. The side walls contain blind round-headed windows, some of which have breathers. On the north side, there is a cross-gabled bay that was later connected to the Granary. Additionally, on the northeast side, there is a small structure with a swept roof open to the east, which is said to have contained a now-infilling pit that connected to a drainage system carrying muck from Stockyard IV to a sump in Stockyard II. A small shed with double doors under a concrete lintel is attached to the north side, while a modern lean-to is attached to the southwest side. The Threshing Barn also has a fragment of a plateway at the eastern entrance.

The Granary features a wide vent ridge made up of glazed and louvred panels, along with round-headed openings leading to Stockyards I and II. Above the farm road, the eastern wing of the Granary has horizontal sliding boarded doors with a steel lintel and threshold. An outshut at the eastern end includes a wide round-headed doorway and boarded doors that have prominent strap hinges.

Internally, the Threshing Barn is divided into three bays. The outer bays are supported by scissor-braced trusses with collar beams, while the central bay, which incorporates the cross-gable to the north, features king posts with raking struts. Access to the upper floor level, reached by modern wooden steps, includes a large round-headed opening to the cross-gable that leads into the Granary, although access to the Granary itself was not possible.