Jeremy Corbyn addressed a rally attended by 300 members of an extremist group linked to the leader of the London Bridge attacks.
He addressed an anti-Israel protest where Islamists from Al Muhajiroun chanted about their support for Osama Bin Laden and shouted slogans calling for Israelis to be gassed. Two were dressed in mock suicide bomber outfits.
Khuram Butt, one of the three Borough Market murderers, was a supporter of Al Muhajiroun and an associate of its leader Anjem Choudary, the jailed hate preacher.
It was also claimed yesterday that the security services are looking into a second attacker's links to the preacher.