Morgan McSweeney resigns as Downing Street chief of staff Financial TimesMcSweeney quits as Starmer's chief of staff, saying he takes 'full responsibility' for advising Mandelson appointment BBCLonely Starmer looks like he doesn't know his own mind Sky NewsMorgan McSweeney resigns as Keir Starmer’s chief of staff The GuardianDon't drop PM over Mandelson, minister urges Labour MPs BBC