Jeremy Corbyn is a defender of anti-Semites and is unfit to lead Labour, one of the party’s MPs who is facing disciplinary action has said.

Ian Austin said he was “ashamed of the Labour Party” as he accused Mr Corbyn of “supporting and defending all sorts of extremists”.

It came as the Board of Deputies of British Jews claimed Mr Corbyn was leading Labour into a “dark place of ugly conspiracy theories”.

Meanwhile, Boris Johnson has said Mr Corbyn “legitimates” anti-Semitism by “merrily dog whistling” to conspiracy theorists who believe Israel is responsible for the “ills of the world”.

Writing in The Telegraph, the former foreign secretary said it was time for Mr Corbyn to “grow up” and address the “virus” of anti-Semitism.