Boris Johnson's premiership has been plunged into fresh crisis after the resignations of four senior Downing Street aides in a single day.
His policy chief Munira Mirza dramatically announced she was quitting over his use of a Jimmy Savile smear against Keir Starmer.
No 10 spin chief Jack Doyle then announced he was resigning and told staff the Downing Street partygate saga had taken a "terrible toll" on his family life.
