New British Prime Minister Liz Truss
New British Prime Minister Liz Truss makes an address outside Downing Street in London, on Tuesday, September 6, 2022 after returning from Balmoral in Scotland where she was formally appointed by Britain's Queen Elizabeth II. Image Credit: AP

London: One of British Prime Minister Liz Truss's most senior advisers has been suspended and is to face a formal investigation by the Propriety and Ethics Team, the BBC's political editor reported on Wednesday.

The prime minister's Downing Street office did not immediately respond to a request for comment.