The late Lord [Victor] Rothschild, scientist, think-tank head, first-class cricketer, bomb-disposal expert and MI5 agent, was a super-spy for the Russians, according to a ... book. The Fifth Man: The Soviet Super Spy, by the Australian author Roland Perry, claims to prove [that] Rothschild stole 'all major UK/US weapons developments in the Second World War', including biological warfare, the atomic bomb and radar. Specifically, he alleges that Rothschild, not Klaus Fuchs, or, as is generally believed, the civil servant John Cairncross, first alerted Stalin to Allied plans to build an atom bomb using plutonium 235. Perry also claims that Rothschild, who died in 1990, was involved 'in so many aspects of spying that he seemed like a super-agent, sabotaging every Western intelligence initiative for 20 years after the war'. The evidence offered is largely derived from three days of interviews in Moscow with seven retired KGB officers, some identified only by initials. The most important was Yuri Ivanovitch Modin, controller of the Cambridge spies, and orchestrator of the Burgess/Maclean defection. But speaking from Moscow late last week, an 'astonished' Modin denied Perry's version comprehensively. No, he had never hinted, nor did he believe, that Rothschild was the fifth man, or any kind of Soviet agent. One explanation may be confusion. Perry attributes to the brilliant Rothschild a number of espionage coups which Modin knows from archives and personal contact were the work of the unassuming Cairncross.

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