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Labour MP Frank Cook was reportedly used by KGB agents in 1987 to deliver a propaganda speech aimed at discrediting Margaret Thatcher's government during nuclear disarmament negotiations. Documents reveal that Cook's participation at a Scottish Campaign for Nuclear Disarmament event promoted disinformation portraying Britain as a warmonger, part of a broader effort by Czech agents to undermine NATO and incite public dissent against the Conservative government. The operation also involved other CND figures providing intelligence on military activities, with the effectiveness of Cook's messaging later confirmed by Soviet spymasters.