{video} Boris Johnson has become the UK’s new prime minister, promising to defy “the doubters, the doomsters and the gloomsters” by completing Brexit with a deal by 31 October. Standing outside Downing Street after visiting the Queen, he gave a speech infused with patriotic pronouncements, saying the “people who bet against Britain are going to lose their shirts”. He also tore into Theresa May’s record of failing to deliver Brexit, saying there had been “three years of unfounded self-doubt” under her government and it was “time to change the record to recover our natural and historic role as an enterprising, ... (full story)