MI5
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The Security Service, commonly known as MI5, is the United Kingdom's domestic counter-intelligence and security agency and is part of its intelligence machinery alongside the Secret Intelligence Servi
Thames House, London
Part of Thames House
Intelligence Services Memorial, Westminster Abbey, honouring all members of the UK's intelligence services since 1909. The inscription reads: "Recognising service at home and abroad protecting the United Kingdom".
Dame Stella Rimington, the first female Director General of MI5
Portland spy ring
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The Portland spy ring was an espionage group active in the UK between 1953 and 1961. It comprised five people who obtained classified research documents from the Admiralty Underwater Weapons Establish
Konon Molody, who used the cover name Gordon Lonsdale, in 1961
Morris Cohen in the 1930s
Lona Cohen, on a 1998 Russian stamp
The former Admiralty Underwater Weapons Establishment on Portland