April 12, 2013 11:47 PM
A huge, protected Second World fortress right in the middle of Central London, sat in between Horse Guards Parade and Saint James's Park.
Horse Guards Parade, London, United Kingdom
Grid Reference: TQ299802
The citadel is still used by the Ministry of Defence, it is now part of the Admiralty Communications Centre.
Last Updated: July 17, 2017 11:01 PM
Admiralty Citadel History
A "vast monstrosity which weighs upon the Horse Guards Parade", as Winston Churchill once described it. Thousands of Londoners and tourists pass the huge fortress, which sits right opposites Saint James's Park but very few realise exactly what its purpose is.
The truth is, not a huge amount is known publicly about the Admiralty Citadel, it was constructed during the Second World War and completed in 1941.
Shrouded behind a wall of creepers is a War World II, bomb proof operations centre built for The Admiralty. The structure has foundations 9 meters deep and a reinforced concrete roof 6 meters thick.
If the enemy had ever made it in to the country, the citadel would have been a strong hold, complete with gun placements.
The citadel is still used today by the Ministry of Defence, in 1992 it became officially known as the stone frigate HMS St Vincent, operated by the Royal Navy as the Admiralty Communications Centre.
In 1998 a series of mergers meant the end of HMS St Vincent although the citadel's role remains the same, albeit under the control of government sub-contractors under its new name Marcomm Comcen (St Vincent).
I've had contacted from several readers of my website who say they used to work in citadel, one said "I used to work here... Great building. Most of what goes on is below the actual bunker." Another simply said, "I also used to work here, in the 'below' bunker... that's all I'll say."
More Underground Locations
July 31, 2017 10:10 PM
July 20, 2017 10:10 AM
The Secret Sights Of London
July 20, 2017 10:06 AM
Royal Observer Corps Posts
July 19, 2017 5:38 PM
July 12, 2017 2:29 PM
March 20, 2017 10:21 PM
Monkton Farleigh Mine
March 20, 2017 1:57 PM
Farleigh Down Tunnel
March 14, 2017 2:47 PM
RAF Chilmark Ammunition Stores
February 23, 2017 11:25 PM
February 23, 2017 10:57 AM
Greenham Common Silos & Bunkers
January 17, 2017 4:47 PM
January 16, 2017 4:07 PM
You May Also Like
Newsletter Sign Up
Sign up to the Higgypop newsletter to find out about new videos and exclusive content first.
Urban Exploration News
Cannabis Farm Uncovered In Secret Underground Tunnels By PoliceSeptember 28, 2018 10:00 PM
How To Prepare For Nuclear Fallout: A Survival GuideSeptember 28, 2018 6:00 AM
How To Prepare For And Survive Civil UnrestAugust 20, 2018 6:00 AM
Drakelow Tunnels Ghost QuizJuly 28, 2018 6:00 AM