Washington/London: In rare public disdain for a British Prime Minister, US President Donald Trump assailed premier Theresa May for the "mess" she created over her handling of the crucial Brexit negotiations with the EU and even welcomed her impending departure from office.

The US President's digital tirade against the British Prime Minister came hours after Downing Street reiterated the UK's ambassador to the US Kim Darroch has May's "full support" following the leak of diplomatic cables highly critical of Trump's presidency. Trump's devastating tweets sent a clear message to London that Darroch, a career diplomat who was Monday branded an anti-Trump globalist by his foes back home, is no longer welcome in the White House. He was dis-invited from a dinner with Trump, the Emir of Qatar and Treasury Secretary Steven Mnuchin on Monday.