The former Sergeants’ Mess, now used as a Garden Store and Security Office, is located on the south side of the Parade Ground. It was built between February 1898 and February 1899, replacing a makeshift establishment in the Short Casemates. The single-storeyed building has grey stock brick cavity walls incorporating bands of a deeper red brick and stands on a chamfered plinth of blue brick. (location accurate to the nearest 1m based on available information)