Kim Darroch’s road map for how to influence the president could benefit any business or government. : THE BIG IDEA: Sir Kim Darroch, the British ambassador to the United States whose diplomatic cables leaked to a London tabloid this weekend, drawing the ire of President Trump, is a career foreign service officer who was just doing his job. The 65-year-old grew up in the projects, won a scholarship to an elite school and joined the Foreign Office in 1977.