"If the House votes to leave without a deal on 29 March, it will be the policy of the Government to implement that decision", she said. On Monday, May said she had secured "legally binding" changes to allay lawmakers' fears - but it wasn't enough.
If no deal is agreed by March 20, "then it is highly likely the European Council at its meeting the following day would require a clear goal for any extension, not least to determine its length, and any extension beyond 30 June 2019 would require the United Kingdom to hold European Parliament elections in May 2019", Thursday's motion says.
Because the majority of ERG Brexiter Tory MPs, perhaps 60 odd or more, would still vote against her Brexit plan.
Chief Secretary to the Treasury Liz Truss suggested that Theresa May's Brexit deal could be brought back to the Commons and win majority support, despite twice being rejected by large margins.
However, Labour leader Jeremy Corbyn said May's Brexit vision had been "decisively rejected" and that it was now time for the prime minister to change course.
Health minister Mr Hammond said the Government whips "asked me to vote against the motion, as amended, to reject no-deal" but "I could not do this as I regard no-deal as a disaster".
"I will not support a deal which is so much worse than the one we have now, and is so far from what was promised to voters in 2016".More news: Baker Mayfield, Jarvis Landry react to OBJ joining Cleveland Browns
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The long-gestating Malthouse Compromise was tabled by a group of both Leave and Remain Conservative MPs, calling for a delay to Brexit from 29 March to 22 May, meant to give the United Kingdom time to prepare to leave without a deal.
In a painfully worded motion, Theresa May did her best to placate all sides of the Brexit divide both in her own party, the House of Commons and in Europe.
In coordinated statements, European Council President Donald Tusk and the bloc's executive European Commission said the EU had done "all that is possible to reach an agreement.it is hard to see what more we can do".
The PM had herself had proposed rejecting no deal, but the complex nature of her motion, which kept no deal on the table in the longer term for negotiating leverage, was rejected. A long delay would potentially clear a path for a second referendum, which could overturn the result of the first.
May's deal covers such things as citizens' rights, the status of the Irish border and Britain's divorce bill from the EU.
Late last night, May and her Brexit secretary Stephen Barclay secured a new agreement with European Union chief Jean-Claude Juncker, which included ensuring that there will be "no indefinite backstop" - the key sticking point for many hard-line Brexiteers.
If that is the outcome, the prime minister will put forward a formal request to the European Union for an extension of Article 50.
"I think what we all want really is a genuine free trade agreement, not membership of a political club, and that is what that document did".