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Deputy ambassador to the US James Roscoe leaves post amid security investigation

May 20, 2026
1 min read
Deputy ambassador to the US James Roscoe leaves post amid security investigation

James Roscoe abruptly leaves post as deputy ambassador to the US

James Roscoe, the deputy to Britain’s ambassador in Washington, has abruptly left his post with no explanation, reports BritPanorama.

Roscoe, 49, had stepped in for Lord Peter Mandelson for several months following Mandelson’s dismissal last year.

Staff at the British embassy in Washington were informed of Roscoe’s departure on Tuesday, yet the Foreign Office has refrained from providing any reasons for the decision. In a brief statement, a Foreign Office spokesman confirmed, “James Roscoe has left his post.”

Although he was initially anticipated to ascend to the role of ambassador, the position was ultimately offered to Sir Christian Turner. Roscoe remained in charge of d’affaires and was influential during Donald Trump’s state visit to the UK last September.

In addition to this, he played a significant role in King Charles’ recent state visit to the US commemorating the 250th anniversary of American independence. His previous positions include serving as the UK ambassador to the United Nations and managing communications for the late Queen Elizabeth II.

Roscoe has also worked as chief press officer in Downing Street under former Prime Ministers Tony Blair and Gordon Brown. Currently, he is facing intense questioning as part of an investigation concerning a leak of top-secret discussions from a National Security Council meeting, The Times reports.

Foreign Office sources noted that senior embassy officials have also been interrogated in connection with the security breach, which allegedly involved verbatim remarks from UK cabinet ministers regarding the ongoing war in Iran.

Mr. Roscoe was responsible for the day-to-day administration of the embassy.

This situation underscores the complexities faced by diplomatic staff amid rising tensions and the need for utmost discretion in handling sensitive information.

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