10 politicians join race to succeed May as Britain's prime minister

File photo taken on Oct. 2, 2018 shows former British Foreign Secretary Boris Johnson speaks at a Conservative home fringe meeting of the Conservative Party annual conference 2018 in Birmingham, Britain. The race to choose a new prime minister officially started on June 10, 2019 with ten hopefuls bidding to win the biggest job in British politics. (Xinhua/Han Yan)