Lord Mandelson has revealed he is working “every single day” to oust Jeremy Corbyn as Labour leader.

The Labour peer said Mr Corbyn was living in a "parallel universe" and that he felt a duty to "rescue" the party from his leadership.

Lord Mandelson, who is one of Mr Blair’s closest allies, said on Monday night that Mr Corbyn had “no idea in the 21st century how to conduct himself as a leader of a party putting itself forward in a democratic election”.