THE EU's chief Brexit co-ordinator has described Boris Johnson as “infantile” after he compared the UK to the Incredible Hulk and the EU to “manacles”.

In an interview over the weekend, the Prime Minister, who is due to meet with European Commission president Jean-Claude Juncker today, insisted there had been “a huge amount of progress” on talks since he had moved into Number 10.

Though that was disputed by Brussels, who yesterday afternoon said they were still very far away from any agreement over the Northern Irish backstop.

The Prime Minister compared the country to Bruce Banner, the mild-mannered comic book scientist who morphs into the Hulk.

Johnson declared: “The madder Hulk gets, the stronger Hulk gets.”

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And he said: “Banner might be bound in manacles, but when provoked he would explode out of them. Hulk always escaped, no matter how tightly bound in he seemed to be – and that is the case for this country.

“We will come out on October 31 and we will get it done.”

European Parliament Brexit negotiator Guy Verhofstadt wasn’t impressed: “Even to Trumpian standards the Hulk comparison is infantile. Is the EU supposed to be scared by this? The British public impressed? Is this Boris Johnson whistling in the dark?”

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However, Scots comic book boffin, and Hulk expert, Dr Scott Jefferey, said there was some merit to the analogy: “Key to the Hulk is that he is a monster, an incoherent child unable to control his primal rage. So maybe it is a good comparison after all.”

The Prime Minister told the Mail on Sunday he would be using his meeting with Juncker today to talk about the solution to the Irish backstop.

“I’m very confident. When I got this job everybody was saying there can be absolutely no change to the withdrawal agreement, the backstop was immutable, the arrangements by which the UK was kept locked in to the EU for ever, they said no-one could change that.

“They have already moved off that and, as you know, there’s a very, very good conversation going on about how to address the issues of the Northern Irish border. A huge amount of progress is being made.”

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Johnson has insisted that he cannot accept any deal with the “undemocratic” backstop arrangement designed to avoid a hard border on the island of Ireland by, effectively, keeping the north in the single market.

EU leaders have repeatedly insisted they will not take the backstop out of the withdrawal agreement unless the UK can present a viable alternative.

Last Thursday, the EU’s chief Brexit negotiator Michel Barnier told MEPs that the UK had yet to present any “concrete proposals in writing that are legally operational”. But Downing Street has said that Monday’s meeting will not be a “big breakthrough” moment.

In other Brexit news, the LibDems pledged to overturn the 2016 referendum result and cancel the UK’s exit from Europe, if they win a majority of MPs at the next election.

That would mean increasing their number of MPs from the current crop of 18 to around 350.

And the SNP tabled a series of questions in the prorogued Parliament urging the Government to answer a “catalogue of unanswered” queries on the impact of a No-Deal Brexit on Scotland’s supplies of food, fuel and medicines.

Despite the chaos of the last week, a new poll by Opinium for the Observer put the Tories on 37%, up two points since last week, and 12 points clear of Labour on 25%.

Just 17% approve of Jeremy Corbyn’s handling of Brexit, compared to 37% who approve of Johnson’s.