Donald Trump is facing growing calls for his impeachment as he arrives in the UK for a three-day state visit during which he and his family will meet the Queen, the Prince of Wales and the Duchess of Cornwall at Buckingham Palace.

The US president’s trip is already off to a rocky start after he launched into an attack on London mayor Sadiq Khan, whom he branded “a stone cold loser” on Twitter, a remark in turn labelled “childish” by a City Hall spokesman.

Before departing Washington, Trump praised Boris Johnson and Nigel Farage, suggested the UK leave the EU without a deal and denied calling Meghan Markle “nasty” in an interview with a British newspaper, despite their having his comment on tape.

Please allow a moment for the liveblog to load