Sir Keir Starmer is facing the toughest 48 hours of his premiership as he battles to save his job amid growing outrage over the handling of Peter Mandelson’s failed security vetting.
With his reputation on the line, the prime minister will on Monday seek to convince the Commons that he was not aware that UK Security Vetting had advised that Lord Mandelson should be denied clearance to become the UK’s ambassador to the US.