British Prime Minister Theresa May's plan for Brexit would "probably kill" the prospects for a free trade deal with the United States, US President Donald Trump said in an interview for The Sun's Friday edition. "If they do a deal like that, we would be dealing with the European Union instead of dealing with the UK, so it will probably kill the deal," said Trump, who began a four-day visit to Britain yesterday.

In extraordinary comments on British politics, Trump also said former foreign minister Boris Johnson, who resigned this week over the Brexit plan and is seen as a potential challenger to May, would make "a great prime minister". He added that London Mayor Sadiq Khan, who authorised protesters to raise a giant balloon showing a nappy-wearing Trump next to the British parliament today, was doing a "terrible job" in fighting crime.