TOPSHOT - Britain's new Prime Minister Boris Johnson gestures after giving a speech outside 10 Downing Street in London on July 24, 2019 on the day he was formally appointed British prime minister. - Boris Johnson took over as Britain's new prime minister on Wednesday vowing to prove the "gloomsters" wrong and get a new deal to leave the European Union on October 31 -- or exit without one. (Photo by Ben STANSALL / AFP)