The Foreign Office's top civil servant is leaving his post after his department did not inform the prime minister that Lord Mandelson had failed security vetting for the role of US ambassador.

British Prime Minister Keir ⁠Starmer ⁠on Friday faced renewed calls ⁠from his political opponents to resign after it was revealed ​that his former ambassador to the United States failed security vetti...

The revelation left him facing calls from opposition leaders to resign, as members of his own Labour Party privately conceded that the premier would have to step down he was found to have known about ...