The building originates from a pair of houses built in what was then known as New Street in 1833 and which were acquired by the 19th Surrey Rifle Volunteer Corps in 1865.

[4] The battalion was mobilised at the drill hall in August 1914 before being deployed to the Western Front.

[2] The drill hall, in what was by then known as Braganza Street, was substantially re-built at that time and the enlarged facility was opened by the Duke of Gloucester in 1938.

[2] After the Royal Artillery went through a re-organisation and vacated the hall, a new field hospital, 217 (London) General Hospital Royal Army Medical Corps, was formed at the Braganza Street drill hall in 1967.

[6] The drill hall is now home to:[7] 256 (City of London & South East) Multi-Role Medical Regiment