54 Broadway — The 'Minimax Fire Extinguisher Company'

Located in London near Saint James's Park, 50 Broadway—formerly 54 Broadway—served as the main base for Britain's Secret Intelligence Service, MI6, from 1924 to 1964. During World War II, the spy agency disguised its headquarters using an entrance plaque reading Minimax Fire Extinguisher Company. Chief Sir Stewart Menzies even accessed the building via a private tunnel from his nearby home.

London · from the walk “Secrets of Westminster & MI6” · audio ~3 min · Generated

50 Broadway, London SW1H 0DB

What cover name was used for MI6 headquarters at 54 Broadway in London during World War II?

Take a good look at the building in front of you. Ordinary, isn't it? A nine-story office block with a mansard roof, tucked between Westminster's government buildings and Saint James's Park. But for Forty years... this was the most Secret address in Britain.......... This is fifty Broadway, formerly known as fifty-four Broadway. It was completed around nineteen twenty-four, and from that moment it became the main operating base for the Secret Intelligence Service... MI six. The funny thing is, the British government didn't even officially acknowledge MI six Existed until nineteen ninety-four. So how do you hide an entire spy agency in the middle of London?......... You put up a brass plaque. During the Second World War, a polished brass sign at the entrance identified this building as the offices of the "Minimax Fire Extinguisher Company." A fire extinguisher business. That was their cover story. And it wasn't a random choice. This tradition of using fictional companies began with MI six's very first chief, Mansfield Smith-Cumming, who started operations in nineteen oh nine under the cover name "Messrs Rasen, Falcon Limited, Shippers and Exporters." He is credited as the originator of the classic "import and export" cover. Sound familiar? Ian Fleming borrowed that idea for James Bond's Secret Service, calling it "Universal Exports."

...... Now, here's what makes this building truly extraordinary. Sir Stewart Menzies, the Chief of MI six, had access to a private tunnel that connected fifty-four Broadway directly to his personal residence on nearby Queen Anne's Gate. He could literally walk from his bedroom to the nerve center of British intelligence without ever stepping outside.......... Kim Philby, the infamous Soviet double agent who worked inside this very building during the war, described it as "a dingy building, a warren of wooden partitions and frosted glass windows." Philby walked these corridors every day... while secretly passing Thousands of classified documents to Moscow.......... But here's a detail most people miss. When MI six first moved in, they shared the building with the Government Code and Cypher School. It was only when the Second World War broke out that the codebreakers were relocated to a little-known place fifty miles northwest of London... called Bletchley Park. So the seeds of Britain's greatest codebreaking triumph were planted Right Here.......... Despite the Minimax disguise, London taxi drivers soon figured out exactly what this building was. And according to a well-known legend, by the mid-nineteen thirties, German Intelligence had placed an agent disguised as a blind match seller who stood opposite the building to monitor all comings and goings. Is it a myth or real? No one knows for certain. But it's a Brilliant story.......... When MI six was finally preparing to move out in nineteen sixty-four, the building's landlord began giving tours to prospective new tenants... Before the spies had left! On one occasion, a so-called "Russian Trade Delegation" came through, prompting frantic covering up of maps and classified material. Not exactly the smooth exit you'd expect from the world's most famous intelligence service.

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