12 Absolutely Wild MI6 Facts That Are Making Me Wonder If I've Been Living Under A Rock This Whole Time

MI6 wasn’t born out of slick spy missions or dramatic shootouts—it started with good old-fashioned paranoia. In 1909, Britain was convinced that Germany was plotting against them, so they secretly set up what would become MI6 to keep tabs on enemy activity, and let’s just say… they’ve been watching ever since.

In the Bond universe, the boss goes by “M.” But IRL? It’s “C.” That’s short for Sir Mansfield Cumming, the very first chief of MI6, who used to sign all his notes with just the letter “C” (in green ink, no less). The tradition stuck. Every MI6 head since has kept the title and the signature style—yes, they still write in green ink. Very on-brand for a secret agent, honestly.

MI6 has been around since 1909, but for most of its life, it was like the Voldemort of government departments—never officially named. Originally set up as the Secret Service Bureau, the agency operated entirely in the shadows. It wasn’t until 1994—yes, the same year Friends premiered—that the British government publicly admitted MI6 even existed. Talk about a long game.

MI6 didn’t always work alone. Back in the day, there were actually 19 different “MI” branches doing everything from decoding messages to watching the skies. MI1 dealt with information management, MI2 focused on Russia and Scandinavia, MI4 handled aerial surveillance, and MI11 (weirdly enough) took on codebreaking. Over time, most of these departments either shut down or got folded into MI5 and MI6. So no, MI6 isn’t just a spy movie thing—it’s what’s left after a major intelligence agency merger. 

MI6 pulled off one of the sassiest cyber moves in spy history. In 2011, agents hacked into an online Al-Qaeda magazine and replaced its bomb-making instructions with… cupcake recipes. Instead of a step-by-step guide to explosives, readers found details for the best cupcakes in America. It was part sabotage, part bake sale, and 100% genius.

Back in 2009, the head of MI6—Sir John Sawers—nearly had his career derailed thanks to his wife’s Facebook activity. She casually posted their home address, vacation photos, and even details about their kids’ locations… all publicly visible. Not ideal for the UK’s most secretive spy. The info was taken down eventually, but not before the headlines started flying.

Back in the early days of MI6, women weren’t sent on glamorous missions or handed briefcases full of gadgets. Instead, they were often used to seduce and compromise targets—what’s known as a “honey trap”—or assigned to secretarial work behind the scenes. It wasn’t until much later that women began taking on actual intelligence roles and field assignments. And now? For the first time ever, MI6 has its female chief. Talk about a full-circle moment.

When the U.S. finally joined World War II, it didn’t exactly have a seasoned spy agency ready to go. So MI6 stepped in. Britain’s top-secret service helped train America’s brand-new Office of Strategic Services (OSS)—aka the baby version of the CIA. That early collab laid the groundwork for one of the most enduring intelligence partnerships in the world.