James Roscoe, one of Britain’s most senior diplomats to the United States, has resigned as deputy chief of mission at the British Embassy in the US capital.According to the BBC report, Foreign Office officials confirmed that Roscoe “has left his post” but did not provide any further details regarding his departure.Roscoe also served as Chargé d’Affaires to the US between September 2025 and February 2026, and temporarily led the embassy during a critical period in UK–US diplomatic relations.Before moving to Washington, Roscoe represented the UK at the United Nations General Assembly and later held senior communications roles within the UK Government, including posts in the Cabinet Office and the Department for Exiting the European Union.She is also known for serving as Elizabeth II’s Communications Secretary between 2013 and 2016.Early in his career, Roscoe worked inside 10 Downing Street as chief press officer for former British Prime Ministers Tony Blair and Gordon Brown.During his time in Washington, Roscoe played a role in major diplomatic events, including arrangements for the state visit of former US President Donald Trump to the UK and the recent visit of Charles III to the United States.His first diplomatic assignments also included postings to the United Nations, Sierra Leone and Iraq.