Historic building recording by H Samuels and S Chandler of ASE. The ammunition depot at Banstead formed one of three depots built between 1938 and 1939 to store and supply ammunition for the anti-aircraft batteries surrounding and defending London. The Banstead site supplied the South-West London sector from Dulwich to Raynes Park and included the South-East region for a short period in 1940. The site officially closed as an active storage/distribution centre in 1953. The site structures form an example of the early use of reinforced concrete for defensive military purposes.

Evaluation by N Humphreys of ASE revealed a heavily landscaped and truncated site with no evidence of a surviving archaeological horizon and no finds or features of archaeological interest.

Evaluation by G Webster of ASE. Although some possible alluvial material was identified in small areas, the site was severely truncated and contaminated by modern material. No archaeologically significant finds, features or deposits were identified.

Evaluation by T Vieira of ASE on land to the west of the lane revealed the base of a small, rectangular, 18th century, brick structure, despite considerable horizontal truncation. Its function could not be determined although its date, together with cartographic evidence, suggests that it is associated with Worcester Park gunpowder mill. No other finds or features were recorded.

Evaluation by J Hirst of ASE recovered a small assemblage of late post-medieval finds from the topsoil, but no archaeological features were present.

Evaluation by C Russell of ASE revealed two linear boundary features of probable medieval date and finds that suggest domestic activity of a similar date in the vicinity. The recovery of a small assemblage of prehistoric flints suggests activity from the period on or near the site.

High resolution, ground penetrating radar survey by Arrow Heritage Ltd within the former car park revealed a single anomaly of possible archaeological interest. A subsequent test pit and trial trench evaluation by C Russell and J Wilson of ASE revealed a single, undated posthole and evidence of recent truncation across much of the site.

An evaluation by G Sheehan of ASE revealed moderate truncation from previous developments and no finds or features of archaeological interest in undisturbed areas.

Watching brief by C Enright of ASE revealed no significant archaeological remains or deposits.

Evaluation by G Sheehan of ASE identified an infilled pond, a tree-planting pit, two brick post-settings and the remains of a number of drainage features, all of late 19th/20th century date and associated with a former walled garden and landscaping.