Intelligence-Related Web Sites

United Kingdom

Government Sites

GCHQ Homepage:

Ministry of Defence:

The British National Archives (Public Record Office):

The catalog at the British National Archives/PRO is searchable on-line:

Released intelligence-related documents go up on the site as they become available:

Secret Intelligence Service (SIS [officially] or MI6 [unofficially]): and

"Welcome to the official website of the Secret Intelligence Service (SIS)."

Security Service (MI5):

"The Security Service (MI5) is responsible for protecting the United Kingdom against threats to national security."

Non-Government Sites

Bletchley Park

A Website devoted to Bletchley Park, past and present, is available at:

For the Bletchley Park Trust see:


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