History: Cases from The National Archives

The National Archives holds nearly 4,000 declassified Security Service files dating from the Service's earliest days through to the late 1950s. More are being released each year.

These pages provide some examples of MI5 documents from The National Archives, illustrating the careers of three key 20th century spies.

To view the case documents, click on the following links:

• Carl Hans Lody - German spy, World War I
  
• Eddie Chapman - British double agent, World War II
  
• Klaus Fuchs - Soviet spy, Cold War