Circa mid 19th century, originally a cash office, later the RAF stores.

A stone-built 2-storey building with a flat roof, plan rectangular with side extensions, flat roofed porch supported by stone columns, on east side.
Shown as Guard House on Admiralty lpan of 1858, Office of Works Dept and Police Office on plan of 1869. (DJP 06/02/1998)