Morgan McSweeney has resigned as chief of staff to UK Prime Minister Keir Starmer, saying he takes “full responsibility” for advising on the appointment of Peter Mandelson.
The resignation marks a significant change within the prime minister’s senior team. In a statement, McSweeney linked his decision to his role in advising Starmer over Mandelson’s appointment.
Starmer responded by thanking McSweeney for his work in government. The prime minister said McSweeney had shown “dedication, loyalty and leadership” while serving as his chief of staff.
The development also drew a reaction from the opposition. Conservative Party leader Kemi Badenoch said the resignation was “about time.”
No additional details were provided in the available information about who will replace McSweeney, the timeline for the transition, or any further changes to the prime minister’s office following his departure.
The BBC reported the resignation on Sunday, February 8, 2026.