Ken Livingstone has claimed Boris Johnson threatened to "punch his lights out" during the last mayoral campaign, after Livingstone had suggested his rival's Turkish great-grandfather might have been a British spy.Source: The Guardian
In his autobiography, published on Monday, Livingstone chronicles the mounting tension during the 2008 mayoral race. Publication comes months before he faces a rematch with Johnson at the 2012 mayoral election in May.
In the book, titled You Can't Say That, Livingstone dismisses his Tory rival as a politician used to "getting away with it" through humour when responding to difficult policy questions. But he says Johnson's "mask slipped" a couple of times during the campaign.
Livingstone recounts an appearance on the BBC's Question Time with Johnson: "After Question Time the cameras were still on us as a smiling Boris draped his arm around my shoulders and said, 'If you carry on talking about my great-grandfather I'm going to punch your lights out.'"