British Prime Minister Boris Johnson (pictured left) finally agreed to step down today after one of his closest allies, Chancellor Nadhim Zahawi (top-inset), told the prime minister to resign for the good of the country. Zahawi's intervention came after two more members of Johnson's Cabinet resigned, along with three junior officials, pushing the number of those who have left the government this week past 50. Pictured right: Officials who resigned today. It was not immediately clear whether Johnson will stay in office while the Conservative Party chooses a new leader, who will automatically become prime minister as well. A formal announcement is expected later Thursday. Johnson on Wednesday rejected calls to resign, arguing that he had a mandate from the voters to remain in office. But by Thursday morning the man who has built a reputation for wriggling out of political controversies was forced to admit the reality of his situation.