Theresa May has come under sustained pressure from the Tory backbenches to renegotiate her Brexit deal while Jeremy Corbyn also warned that her draft withdrawal agreement was "dead".

As the Prime Minister prepared to leave for tea and talks in Brussels with Jean-Claude Juncker, the European Commission President, she was asked to change tack or risk breaking up the Union.

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During Prime Minister’s Questions, Brexiteer Andrew Rosindell told her that he was "deeply unhappy" with the withdrawal agreement and urged her to lead the country in a new direction by "completely cutting away the tentacles" of the EU.

His Conservative colleague Neil Parish, Chairman of the Commons Environment, Food and Rural Affairs Committee, also warned that the Irish border backstop "threatens the integrity of the UK" and advised Mrs May to listen to concerns raised by MPs.

In parallel, the Labour leader pushed Mrs May over the detail of her plans although the PM countered by claiming the Labour leader had not read the draft Brexit deal, adding: "Never mind a second referendum, he hasn't got a first clue."

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Opening what was largely a more subdued PMQs than usual, Mr Rosindell claimed his constituents in Romford in Greater London, were “deeply unhappy” by the proposed EU deal, which did not represent the Brexit they had voted for.

"Will she now, even at this late stage, please think again and instead lead our country in a new direction completely cutting away the tentacles of the EU over our cherished island nation once and for all?"

Mrs May insisted her deal delivered on the promises of Brexit and ensured a continued close trading relationship with the EU.

Mr Corbyn began by referencing comments from Amber Rudd, the new Work and Pensions Secretary, that no-deal could be prevented by the UK Parliament.

He said: "A number of Government ministers have confirmed this morning that leaving the EU with no-deal is not an option, does the Prime Minister agree there are no circumstances under which Britain would leave with no-deal?"

The PM replied: "The point that has been made by a number of my colleagues in relation to the vote that will come before this House on a meaningful vote on a deal from the European Union is very simple.

"If you look at the alternative to having that vote with the European Union it will either be more uncertainty, more division or it could risk no Brexit at all."

Mr Corbyn argued the PM did not answer the question before saying Mrs May's "idea of taking back control of our money is to hand the EU a blank cheque" and added the UK would have no rebate after 2020.

Mrs May hit back by claiming Mr Corbyn "hasn't even read" the draft Brexit deal and also criticised his interpretation of it.

The Labour leader said the Government had got Britain into this "shambles" before repeating his party had not ruled out all options.

Concluding his remarks, Mr Corbyn labelled the deal a "failure" and told the Commons: "It fails the Prime Minister's red lines, fails Labour's six tests, and it fails to impress the new Northern Ireland minister [John Penrose], who just hours before he was appointed said the deal is 'dead'.

"Instead of giving confidence to the millions of people who voted both Leave and Remain, this half-baked deal fails to give any hope that it can bring the country together again.

"Isn't it the case that Parliament will rightly reject this bad deal, and if the Government can't negotiate an alternative then it should make way for those who can and will."

Mrs May replied: "He is opposing a deal he hasn't read, he's promising a deal he can't negotiate, he's telling Leave voters one thing and Remain voters another - whatever he will do, I will act in the national interest."

Later, Mr Parish told the PM, noting how he was a great supporter of hers: "The Northern Irish backstop threatens the integrity of the UK and weakens our negotiating position and my farming instincts tell me you do not hand over £39 billion before you get a deal.

"Please can I ask you to listen to these concerns and renegotiate the deal before you put it onto the floor of this House?"

Meanwhile, Nigel Dodds, the DUP Westminster leader, who was nodding as Mr Parish made his remarks, accused the PM of "deleting" previous assurances over the Irish border issue.

He said: "In the December joint report agreed between the European Union and the United Kingdom it was agreed that Northern Ireland would have the final say on whether or not it diverged from the UK single market and was subjected to single market European rules with no say, why has the Prime Minister deleted all reference to that in the withdrawal agreement.

"Did she push the delete button?"

Mrs May responded by saying he was "absolutely right" about the December report but added: "The December joint report referred to a decision being taken by the Northern Ireland Executive and Northern Ireland Assembly which sadly we do not have in place today."