Get the free Morning Headlines email for news from our reporters across the world Sign up to our free Morning Headlines email Sign up to our free Morning Headlines email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice Sir Keir Starmer has insisted he will lead Labour into the next general election, but admitted that appointing Lord Peter Mandelson ambassador to Washington DC was a “mistake”. The Prime Minister’s authority