The underground Cabinet War Rooms, now a museum beneath the Treasury, were a hive of activity throughout the Second World War. While Winston Churchill’s leadership dominates the story, the rooms would have been silent without the typists, officers, engineers and countless support staff who kept the operation running around the clock.
The Secretive Setting: The Cabinet War Rooms
Carved into the basement of the Treasury building, the War Rooms comprised the Map Room, the Transatlantic Telephone Exchange, the communications hub and a network of corridors that linked to the Prime Minister’s Office. From 1939 to 1945 the complex was a self‑contained command centre, insulated against air‑raids and equipped with its own generators, water supply and food stores. Every decision that shaped the Allied war effort passed through these corridors, and a well‑organised staff ensured that information moved swiftly and securely.
Typists and Clerical Corps
Speed and accuracy were vital. A dedicated team of typists, many of them women from the Civil Service, transcribed orders, minutes and intelligence reports for senior officials. Their work was the backbone of the communication chain, turning hurried handwritten notes into legible documents that could be filed, copied and dispatched.
- Typed minutes of Cabinet meetings for immediate distribution.
- Prepared secret memoranda using the latest cipher machines.
- Maintained a continuous log of incoming and outgoing telegrams.
- Handled routine correspondence, freeing officers to focus on strategy.
Military Officers and Command Staff
Senior officers from the Army, Royal Navy and Royal Air Force occupied the Map Room and adjoining offices. They interpreted aerial photographs, plotted enemy movements and briefed Churchill on the latest developments. Their presence ensured that strategic decisions were grounded in up‑to‑date intelligence.
- Map Room officers who updated large‑scale maps with real‑time data.
- Air‑raid warning officers coordinating with the Home Guard.
- Naval liaison officers monitoring convoy routes and submarine threats.
- Intelligence officers filtering reports from Bletchley Park and other sources.
Civil Servants, Engineers and Support Teams
Beyond the front‑line staff, a cadre of civil servants and engineers kept the underground complex functional. They managed the power generators, maintained the ventilation system and oversaw the supply of food, water and medical provisions. Their expertise meant the rooms could operate continuously, even during the most intense bombing raids.
- Electrical engineers who serviced the backup generators and lighting.
- Plumbers and sanitation staff ensuring fresh water and waste removal.
- Logistics officers coordinating deliveries of rations and medical kits.
- Security personnel controlling access and maintaining secrecy.
Women of the War Rooms
Women played a pivotal role across every department. Members of the Women’s Royal Naval Service (WRNS), the Auxiliary Territorial Service (ATS) and the Civil Defence Corps filled positions that ranged from signal operators to cooks. Their contribution not only freed men for front‑line duties but also introduced a new level of efficiency and professionalism to the underground command centre.
WRNS operators, for instance, handled the Transatlantic Telephone Exchange, ensuring that Churchill could speak directly with Allied leaders in Washington and Moscow. ATS clerks managed the flow of paperwork, while the Home Guard’s women’s units prepared emergency medical kits and tended to the morale of the staff.
Keeping the Rooms Alive Today
Visiting the Cabinet War Rooms offers a glimpse into the relentless effort of these unsung heroes. A guided Westminster WWII walking tour can add valuable context, linking the underground chambers to the streets above where the war’s impact was felt daily. When planning your visit, check the museum’s website for the latest information on tickets, accessibility and any special exhibitions that may be on display.
See Westminster's War Story on Foot
The best way to bring the Churchill War Rooms to life is a guided Westminster WWII walking tour — Whitehall, the bunkers and the streets Churchill knew.
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