But he can, technically, be deposed as Tory leader and remain in office. He will not be removed from No 10 until he tenders his resignation as prime minister, or until he loses a vote of no confidence in the House of Commons (the last PM to lose such a vote was Labour’s Jim Callaghan in March 1979). Johnson will not, like Donald Trump, attempt to stay in power once the Tory party does select a new leader, but he has notably chosen not to tender his resignation as prime minister until it does.