Last Updated on 26/02/2026
The City of London maintains long‑standing and valued relationships with the Armed Forces of the Crown; Regular, Reserve and Cadet Forces. The Mansion House Programme Office coordinates the Lord Mayor’s strategic engagement across defence, while ceremonial matters at Mansion House are overseen by the City Marshal.
Companies and Guilds seeking information on forming or developing a military affiliation should use the service contacts listed below.
Royal Navy & Royal Marines
Naval Regional Commander, London & Eastern England, HMS President, 72 St Katharine’s Way. London E1W 1UQ
British Army
General Officer Commanding London District and Major‑General Commanding the Household Division, HQ London District, Horse Guards, Whitehall, London SW1A 2HB
General enquiries: 020 7218 7907
Royal Air Force
Assistant Chief of the Air Staff (ACAS),Whitehall, London SW1A 2HB
General enquiries: 020 7218 9000
Reserve Forces
The Lord Mayor serves as President of the City of London Reserve Forces & Cadets Association (RFCA).
General contact: 07917 835 455
Website: Greater London Reserve Forces and Cadet Association website.
