MPs have authorised Theresa May to go back to Brussels and try to renegotiate her Brexit deal.

But one of the Prime Minister’s most important negotiating weapons was ripped from her hands, as the House of Commons also voted to block a no-deal Brexit.

The result of a series of votes on amendments to Mrs May’s Brexit Plan B has left the Conservative leader with a massive headache as the clock ticks towards the scheduled date of EU withdrawal on March 29.

She had issued a plea for MPs to give her a clear "mandate" to reopen the Withdrawal Agreement which she agreed with the EU last November and seek to secure changes to its controversial backstop provision.

It comes as she told MPs there is a "substantial and sustainable" majority in the Commons for leaving the European Union with a deal but admitted renegotiation "will not be easy".

Mrs May secured the backing of the Commons to go back to Brussels, as MPs voted by 317 to 301 in favour of a proposal from Tory grandee Sir Graham Brady for her to try to replace the backstop with "alternative arrangements" to keep the Irish border open after Brexit.

Read more: Emirates holding cabin crew open day in Glasgow this weekend

Labour leader Jeremy Corbyn told the House of Commons he is prepared to meet with the Prime Minister to discuss Brexit.

While the SNP's Westminster leader Ian Blackford has claimed by passing the Brady amendment the Government had "ripped up the Good Friday Agreement".

To jeers from Tory MPs he said in his point of order that he called for the Prime Minister to make sure that a no-deal Brexit was taken off the table.

Slamming the decision he said: "We were told the backstop was there to protect the peace process but tonight the Conservative Party has effectively ripped apart the Good Friday Agreement."

"This House should be ashamed of itself.

"The contempt shown by the United Kingdom Government right across these islands is stark. This government, Westminster and the Tory party has no respect for the devolved administration or the other regions of the United Kingdom."

He said Scotland had been "silenced, sidelined and shafted by the Tories".

First Minister Nicola Sturgeon tweeted: "The House of Commons could have asserted itself tonight - instead it indulged the PM’s decision to chase a fairytale at the behest of the DUP/ERG, and increased the risk of no deal in the process. A woeful abdication of responsibility."