London mayor Boris Johnson
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Boris Johnson defends tough questions he faced from the BBC's Eddie Mair

The mayor of London Boris Johnson has defended BBC presenter Eddie Mair's right to ask tough questions.

Mr Mair, who was presenting the Andrew Marr programme, described Mr Johnson as "a nasty piece of work" after reminding him of a variety of incidents from his political and journalistic career.

Watch Boris Johnson's interview with Eddie Mair

BBC Two - Boris Johnson- The Irresistible Rise

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