Morgan McSweeney, Keir Starmer’s chief of staff, has quit his role as the prime minister’s closest aide amid anger over the appointment of Peter Mandelson as US ambassador.
The senior No 10 adviser’s position had grown increasingly untenable as pressure on the prime minister mounted over the scandal, which followed the release of emails underlining the extent of Mandelson’s ongoing relationship with the convicted child sex offender Jeffrey Epstein.
