US President Donald Trump hits out at British PM Theresa May over 'messy' Brexit, says, 'good news for UK that they will have a new PM'

US President Donald Trump launched an extraordinary attack on Monday on outgoing British premier resa May, following leak of diplomatic cables highly critical of his presidency.

London has been scrambling to stem dam caused by weekend release of confidential telegrams in which its envoy to Washington, Kim Darroch, described US leer as "inept" and his White House as "uniquely dysfunctional." 

Visibly angered by May's continuing support for her ambassor, Trump assailed prime minister over her handling of fraught Brexit negotiations, and welcomed her impending departure from office.

"What a mess she and her representatives have created," Trump fumed in a series of tweets. 

"I told her how it should be done, but she decided to go ar way." " good news for wonderful United Kingdom is that y will soon have a new Prime Minister," he wrote.

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As for London's man in Washington, Trump declared he would have furr contact with him.

"I do t kw Ambassor, but he is t liked or well thought of within U.S," president said, doubling down on weekend comments claiming his ministration were "t big fans" of Darroch.

"We will longer deal with him," Trump vowed.

cables' publication in Mail on Sunday newspaper came just a month after Trump enjoyed a state visit to Britain that included a 41-gun salute welcome at Buckingham Palace and a banquet dinner with queen.

incident threatens to complicate London's efforts to strike a new tre agreement with key ally United States, in hope of mitigating potential dam from Britain's withdrawal from European Union.

May's office called leak "unacceptable," but said " prime minister has full faith in her ambassor to Washington."  

British officials defended Darroch as carrying out his duties by providing "frank" accounts of developments in Washington.

"Our ambassors provide honest, unvarnished assessments of politics in ir country," a Downing Street spokesman said.

"As you'd expect, contact has been me with Trump ministration setting out our view that we believe leak is unacceptable."

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Foreign Secretary Jeremy Hunt said culprit, if identified, would face "very serious consequences." 

His US affairs deputy Alan Duncan told parliament police could launch ir own investigation "if evidence of criminality is found." 

Daily Telegraph newspaper said such memos are seen by up to 100 people working in Foreign Office and or government departments.

"But it would require a single official or minister to have access to whole cache, inevitably casting spotlight on senior ministers," it wrote.

immediate suspicion of London papers fell on Brexit-backing players in a power struggle within governing Conservative Party.

British politics are in for a major revamp once May ends her three-year spell in power later this month.

Brexit-supporting former foreign minister Boris Johnson is favorite to replace her in a leership contest against Hunt.

winner will get to appoint his own US envoy by time Darroch's term expires in January.

Commentators te that official widely tipped for Washington job was less enthusiastic about Brexit than Johnson or some members of his team.

"re have been reports that Mark Sedwill, current cabinet secretary, is being lined up for position," Guardian's diplomatic editor Patrick Wintour wrote.

But Trump "may be suspicious of Sedwill, and would prefer a true Brexiter".

Wintour wrote that Sedwill "may t fill that bill, but Nigel Far -- who pretty openly campaigned for job before Darroch's appointment in 2016 -- does."

Far has met Trump on several occasions and has brandished his anti-EU credentials by leing his Brexit Party to victory in European elections in May.

Far on Monday called Darroch's memos "pretty irresponsible" even as he played down his interest in job.

"I'm t a diplomat, and I think that's quite an understatement," he told BBC rio.

But Far ded that he "could be very useful" in forging a better relationship "with an ministration that contains friends of mine."