Historic building recording by L Prosser for SCAU. The two principal buildings were of early 20th century date, later augmented by structures in the 1950s–70s that created a continuous industrial complex with smaller associated buildings. Several of these are probably also of early 20th century date. The earliest buildings were fairly technologically advanced, employing lightweight steel-framed construction with pink Fletton brick infill. Subsequent modification and development was traceable through the 20th century, with later augmentation and remodelling of the older buildings.