"I leave with pride in all we have achieved mixed with regret at the circumstances of my departure", McSweeney says in a statement.

Morgan McSweeney quits as PM’s chief of staffpublished at 14:20 14:20Breaking

We’ve just learnt that Keir Starmer’s chief of staff Morgan McSweeney has resigned.

“After careful reflection, I have decided to resign from the government. The decision to appoint Peter Mandelson was wrong. He has damaged our party, our country and trust in politics itself,” he says in a statement.

This story is developing. We’ll bring you more in just a moment.