Sir Kim Darroch resigned from his role in 2019 after emails were leaked in which he called the Trump administration "clumsy and inept".
Former UK ambassador to the US, Sir Kim Darrroch, on the controversy over the Brexit Withdrawal Agreement and the resignation of the government's most senior lawyer.
Donald Trump has reacted to the resignation of the UK's ambassador to the US. The US president had called Sir Kim Darroch "a very stupid guy" - but now says he wishes him well.
Boris Johnson has responded to criticism that he caused the resignations of the UK's ambassador in America, Sir Kim Darroch.
By Gavin Stamp
Political reporter, BBC News
Sir Alan Duncan MP says Boris Johnson should have supported Sir Kim Darroch following the resignation of the UK's ambassador to the US.
Moments after the resignation of the UK's ambassador the US, Theresa May and Jeremy Corbyn pay tribute to his service.