"The rhetoric may have changed but the deal has not," said Labour leader Jeremy Corbyn. "She did not seek a compromise until after she had missed her own deadline to leave, and by the time she finally did she had lost the authority to deliver."

Johnson, an ardent backer of Brexit, has previously spoken of his admiration for President Donald Trump, although when he was London's mayor the flamboyant and gaffe-prone politician also said that Trump was "clearly out of his mind."

Other possible replacements for May, who will be largely unknown to Americans [BWAH!], include: former Brexit secretary Dominic Raab; environment secretary Michael Gove; foreign secretary Jeremy Hunt; and Sajid Javid, Britain's interior minister.