The origins of Double Cross went back to an adventurous MI5 double agent in the mid-1930s, the First World War fighter ace, Christopher ‘Mad Major’ Draper, who flew under 15 of London’s 18...

During the Second World War, it developed the Double-Cross System. This involved attempting to 'turn' captured agents wherever possible, and use them to mislead enemy intelligence agencies. After the war, the service was instrumental in breaking up a …

The Double-Cross System or XX System was a World War II counter-espionage and deception operation of the British Security Service (MI5). Nazi agents in Britain – real and false – were captured, turned themselves in or simply announced themselves, and were then used by the British to broadcast mainly disinformation to their Nazi controllers.

Eric Arthur Roberts (18 June 1907 – 17 [1] or 18 [2] December 1972) was an MI5 agent during the Second World War under the alias Jack King. [3][4] By posing as a Gestapo agent and infiltrating fascist groups in the UK, Roberts was able to prevent …

2011年2月17日 · Intelligence expert and spy writer Nigel West uncovers the dramatic story of wartime double cross. MI5's performance in running a stable of double agents during the Second World War is still...

2025年3月25日 · MI5 enjoyed great success during World War II, but its record during the Cold War was mixed. Widely publicized blunders during that period—e.g., the Soviet Union was found to have deeply penetrated both MI5 and MI6, the agency responsible for foreign intelligence—undermined confidence in MI5.

On the outbreak of the First World War MI5 officers arrested 22 German agents. Over the next year another seven spies were caught. Eleven men were executed, as was Sir Roger Casement, who was found guilty of treason in 1916. By the end of the war MI5 had a staff of 5,000 people whose main job was inspecting foreign mail.

2025年2月20日 · During World War II, MI5 played a crucial role in countering German espionage activities in Britain. The Double-Cross System emerged as a key component of MI5’s efforts to neutralize German spies and use them to feed false information back to the German intelligence services, particularly the Abwehr.

2016年5月31日 · Juan Pujol Garcia, best known as MI5 agent GARBO, was the greatest Allied double agent in WW2 for his wild role ensuring victory on D-Day. Today TGNR continues it’s campaign recognizing the most important and lesser known heros of the Second World War.

During World War II, the Security Service played a key role in combating enemy espionage, intercepting German communications and feeding misinformation back to Germany.