Another Labour MP says Morgan McSweeney should go as Harriet Harman says PM left looking ‘weak, naive and gullible’

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Keir Starmer was facing renewed calls to sack his most senior adviser on Friday as Downing Street braced itself for another round of leadership speculation when the files relating to Peter Mandelson’s appointment as US ambassador are published.

The Labour MP for Stroud, Simon Opher, added his voice to those calling for the departure of Starmer’s chief of staff, Morgan McSweeney, who was instrumental in the decision to appoint Mandelson despite concerns about his relationship with Jeffrey Epstein.

The former Labour deputy leader Harriet Harman said the prime minister had looked “weak, naive and gullible” after he apologised for having put Mandelson into such a high-profile and sensitive role.