<p>Cambridge spy Guy Burgess was a supreme networker, with a contacts book that included everyone from statesmen to socialites, high-ranking government officials to the famous actors and literary figures of the day. He also set a gold standard for conflicts of interest, working variously, and often simultaneously, for the BBC, MI5, MI6, the War Office, the Ministry of Information and the KGB. Despite this, Burgess was never challenged or arrested...