Boris Johnson has blasted Donald Trump's claims a comprehensive free trade agreement between Britain and the US would be impossible to negotiate after the US President trashed his Brexit deal.
Mr Trump dropped the diplomatic hand grenade in an interview with his friend Nigel Farage on LBC last night as he also urged the Brexit Party and the Tories to form an 'unstoppable' general election pact.
The Prime Minister has insisted that his Brexit deal would open the door to a lucrative and wide-ranging free trade deal with the Trump administration when Britain leaves the EU.
But last night Mr Trump said it would be difficult to trade with the UK under Mr Johnson's Brexit deal, telling Mr Farage: 'To be honest with you... this deal... under certain aspects of the deal... you can't do it, you can't do it, you can't trade.
'We can't make a trade deal with the UK because I think we can do many times the numbers that we're doing right now and certainly much bigger numbers than you are doing under the European Union.'
Afterwards, a Number 10 spokesman said: 'Under this new deal the whole of the UK will leave the EU Customs Union, which means we can strike our own free trade deals around the world from which every part of the UK will benefit.'
But the president's intervention will be a boost to Jeremy Corbyn, although Trump said of the Labour leader: 'Corbyn would be so bad for your country. He'd be so bad, he'd take you in such a bad way. He'd take you into such bad places.'
Donald Trump gave a pohone interview to his friend Nigel Farage where he appeared to trash Boris Johnson's trade deal, sparking a panicked response from No 10
Mr Trump made the bombshell comments during an LBC interview with Mr Farage last night, where the president said the Tories and Brexit Party should make an election pact
Mr Johnson, pictured on the campaign trail at a self defence class in Hendon yesterday, has insisted free trade around the world will follow if MPs vote through his deal
On the PM's Brexit deal: 'To be honest with you this deal under certain aspects of the deal you can't do it, you can't do it, you can't trade, I mean we can't make a trade deal with the UK.'
On Mr Farage: 'You're like a great tea leaf reader.'
On a Tory/Brexit Party pact: 'I wish you two guys could get together I think it would be a great thing... if you and he get together as, you know, unstoppable force.'
On meeting the Queen: 'A great, great woman, and I think we hit it off really well.'
On Theresa May: 'I told her exactly how to make a deal but she didn't listen to me and that's okay, not everybody listens to me, some people do.'
On Jeremy Corbyn: 'Corbyn would be so bad for your country. He'd be so bad, he'd take you in such a bad way. He'd take you into such bad places.'
On Brexit: 'I think they're gonna get that done. People are tired of hearing about. We're even tired of hearing about it over here. I think you'll get that done.'
Mr Trump last night piled pressure on Nigel Farage to forge a pact with Boris Johnson and save Britain from Jeremy Corbyn.
In an extraordinary intervention, the US President said the PM and Brexit Party leader would be an 'unstoppable force' if they teamed up for the General Election.
Mr Trump said of the Labour leader: 'Corbyn would be so bad for your country. He'd take you into such bad places.'
And the President rubbished Mr Corbyn's claim that the NHS was 'on the table' in talks about a US trade deal, saying: 'We wouldn't even be involved in that... it's not for us to have anything to do with your healthcare system. No, we're just talking about trade.'
It came as Mr Farage prepared to reveal this morning whether he will bow to calls to soft-pedal against the Conservatives in next month's election to help ensure a parliamentary majority for Brexit.
Senior Brexit Party figures have urged Mr Farage to stand down hundreds of candidates to give Mr Johnson a clear run and ensure that Brexit is finally delivered.
One source said 'dozens and dozens' of Tory MPs had urged the party to stand aside or risk seeing Brexit thwarted again. But Mr Farage last night indicated he will not back down unless the PM abandons his Brexit deal and agrees to go for a 'clean break' with the EU.
Mr Trump's diplomatic bombshell came as:Mr Johnson, hitting the campaign trail for the first time, pledged to deliver Brexit by January 'at the absolute latest'; A new poll gave the Tories a 17-point lead over Labour; Mr Trump defended his controversial attempt to broker a meeting between the family of British teenager Harry Dunn and the US diplomat's wife accused of killing him in a road accident, saying he had hoped they could 'grieve together'; The US President appeared to take a swipe at the Duchess of Sussex's criticism of her media treatment, saying: 'She's taking it very personally';
Mr Trump's intervention came in an interview on Mr Farage's show on LBC Radio.
The US President heaped praise on Mr Johnson, describing him as a 'terrific guy' who would deliver Brexit.
Mr Trump repeatedly appealed to Mr Farage to join forces with the Conservatives at the election, telling him: 'I'd like to see you and Boris get together cause you would really have some numbers – you did fantastically in the last election, and he respects you a lot. I just wish you two guys could get together – I think it would be a great thing.'
But the Brexit Party leader was circumspect about the chances of an electoral pact.
Mr Farage said the PM had brought 'a tremendous amount of energy to the job'.
But he remained critical of Mr Johnson's Brexit deal – and suggested he would only back down if the PM switched to a No Deal strategy. He told Mr Trump: 'If he drops this dreadful deal, fights the General Election on the basis that we just want to have trade with Europe but no political influence, do you know what? I would be right behind him.'
Mr Trump said Jeremy Corbyn, pictured launching his election campaign in London, would be 'so bad' for the UK
Mr Corbyn has repeatedly claimed that US corporations could be given access to the NHS as