Mark Dunton

In celebration of our new exhibition featuring these secret files and spy gadgets, this episode of our podcast delves into the real world of espionage.

In 1938, thanks to years of work by a remarkable female agent, MI5 ensured a package of British defence plans stayed secret.

Over 100 Security Service (MI5) files are being released today covering a wide range of subjects and individuals. Most notably, the Cambridge Five spy ring.