Sadiq Khan, Labour's candidate for London mayor, supported groups promoting Islamic extremism and gave a speech while the 'black flag of jihad' was openly flying, MailOnline can reveal.

In a series of incidents between 2008 and 2012, Mr Khan promoted organisations that have advocated violence against women, been accused in Parliament of spreading anti-Semitism and homophobia, and staged events featuring extremists and terrorists.

The revelations will come as a major embarrassment for the mayoral hopeful, who has spoken publicly of his concerns that his own daughter will become an extremist.

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