New files show he first came to attention of security service in the 1930s. He became a minister in post-war labour government when he was spied on. But some in the service asked why it took an interest in him.
In 1933, he summarized what they knew of bevan's activities. Some wondered why they weren't watching him at all. In 1949, MI5 became increasingly concerned about his friendship with convicted spyer Wilfred Macartney.
Sir percy Sillitoe says he was passing information from bevan to pollitt. He says the party broke up in a "no too friendly atmosphere" the file was not closed until 1975, 15 years after Bevan died.
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