Keir Starmer faces a make-or-break showdown with MPs after the Peter Mandelson scandal brought the Government into crisis. The Prime Minister faces questions over why the so-called Prince of Darkness was sent to Washington despite failing a vital vetting procedure. Mr Starmer has insisted he did not know, and said it was "outrageous" the Foreign Office did not inform him. On Thursday the department's chief, Sir Olly Robbins, was dramatically sacked after the latest revelation. But the former