Gray is said to have hated the attention of the Partygate investigation, making her “feel vulnerable” after decades working in the civil service, which she joined straight from school in the 1970s.

Sue Gray has dramatically resigned as Keir Starmer’s chief of staff. The announcement came following weeks of behind-the-scenes rows among the prime minister’s top team. She said recent speculation about her future had become “a distraction to the government’s vital work”.

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