Sadiq Khan was accused of being unfit to become London's next mayor after footage emerged of him describing moderate Muslims of being "Uncle Toms".

Labour is under fresh pressure over its handling of racism and anti-Semitism in the party amid revelations its London mayoral candidate used a racial slur, and criticism from the Chief Rabbi.

Ephraim Mirvis said Labour had a "severe" problem with anti-Semitism that would get worse if the party's inquiry into the issue was used as "sticking plaster" to placate voters.

Labour leader Jeremy Corbyn set up an independent investigation into anti-Semitism and other forms of racism within the party as the row over the handling of controversial comments by prominent figures continued to engulf the party.