THERESA May’s new Brexit deal plan was all but killed off last night, with the SNPLabour, the DUP and many Tory MPs promising to vote it down when it comes to Parliament next month.

For days now Downing Street has been promising a “bold” new agreement to win over a majority of MPs in the Commons. And there were some unexpected proposals from the Prime Minister, including the prospect of a vote on a second referendum.

But the 10-point “offer to everyone in Parliament”, that May said MPs could unlock if they were to back her deal at the next meaningful vote, didn’t go far enough for the opposition and went too far for her own party.

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The SNP’s Ian Blackford described May’s new deal as “hollow rhetoric” and a clear signal the Prime Minister is determined to ignore the people of Scotland.

Speaking behind a lectern emblazoned with the slogan “seeking common ground in Parliament”, the Tory leader was seemingly successful only in managing to unite a majority of MPs against her agreement.

The deal, agreed by Cabinet after a stormy two-hour session, could see MPs offered a choice over the UK’s future customs arrangements.

They will get to choose between the Government’s existing proposal, which allows the UK to keep an independent trade policy but delivers some of the benefits of a customs union, or a full – but temporary – customs union with the EU. It would also offer to have “alternative arrangements” to the Northern Ireland backstop ready by December 2020, so it’s never used.

In an appeal to MPs, May said that the “biggest problem with Britain today is its politics” but with the right Brexit deal “we can end this corrosive debate”.

“Look around the world and consider the health of liberal democratic politics. And look across the United Kingdom and consider the impact of failing to deliver on the clear instruction of the British people in a lawful referendum,” she warned.

On a second referendum, May said MPs who back the so-called People’s Vote, would need to support her deal first.

Blackford said May was “determined to keep on ignoring the people of Scotland and to impose Brexit on Scotland.”

He also warned of the constitutional dangers the Withdrawal Agreement Bill posed to the Scottish Parliament.

“Given this Bill clearly cuts across devolution it will require the legislative consent of the Scottish Parliament. It seems inconceivable that Holyrood would give that consent, and it would be yet another democratic outrage if Westminster went ahead anyway.”

Labour leader Jeremy Corbyn said his MPs wouldn’t “back a repackaged version of the same old deal – and it’s clear this weak and disintegrating government is unable deliver on its own commitments”.

Tory MP Ross Thomson, a long-time critic of May’s initial deal and who performed a massive U-turn in March to back his leader, said yesterday’s speech had forced him to change his mind again.

He tweeted: “I reluctantly voted for the PM’s deal on the third go as I saw it as the only way to ensure we left the EU on 29th March.

“I will not support the PM’s new deal that enables a second EU referendum. To do so only serves to do the SNP’s dirty work for them with their #IndyRef2 drive.”

Steve Baker from the ERG, said May had “worsened the situation”.