A triumphant Boris Johnson has succeeded in agreeing a new Brexit deal with the EU but now faces a battle to convince MPs to back it.
The Commons will vote on the new Brexit withdrawal agreement on Saturday. It comes after MPs twice rejected a similar deal agreed between the EU and the UK government, when Theresa May was Prime Minister.
Mr Johnson said the "fair" and "reasonable" agreement would protect the Irish peace process and allow the whole of the UK to take part in new free trade deals.
"I hope very much now, speaking of elected representatives, that my fellow MPs in Westminster do now come together to get Brexit done, to get this excellent deal over the line and deliver Brexit without any more delay," he added.
But Labour vowed to oppose the deal while the Northern Ireland DUP party, which has 10 MPs, will also vote against it.
Labour Shadow Brexit Secretary Sir Keir Starmer said: "It paves the way for a decade of deregulation. It gives Johnson licence to slash workers’ rights, environmental standards and consumer protections."
The main change to the withdrawal agreement is that the backstop, an arrangement designed to prevent a hard border emerging between Ireland and Northern Ireland, has been replaced by a complex system which creates a border for goods between Northern Ireland the rest of the UK. Goods will be checked on entry to the island of Ireland, avoiding the need for border checks when they pass between Northern Ireland and the Irish Republic.
In other respects, the agreement contains the same measures as Mrs May's deal. That includes creating a transition period so that the current trading arrangements continue while the EU and UK work on a permanent trade deal.
European Commission President Jean-Claude Juncker added to the pressure on MPs to back the agreement by hinting that the EU might refuse to grant a Brexit extension - which would mean the UK must leave on October 31 whether there is a deal or not. Many MPs are determined to avoid a "no-deal" Brexit following warnings from employers that it would devastate industries such as manufacturing.
He told reporters the deal "has to" be approved by Parliament, adding: "Anyway there will be no prolongation.
"We have concluded a deal and so there is not an argument for further delay - it has to be done now."
However, the 27 remaining EU member states would take the decision on whether to grant any British request for another Brexit delay or not.
MPs are expected to hold a meaningful debate on the deal on Saturday after MPs on Thursday approved a motion to hold the first weekend sitting of Parliament in 37 years.
If they back it then Brexit is set to take place on October 31 with a deal.
If Parliament does not vote for the agreement on Saturday, the PM faces an almighty clash over whether he will request a further Brexit delay from Brussels - as he is compelled to under laws known as the Benn Act.
Jeremy Corbyn was quick to dismiss the PM's agreement, criticising it for creating a customs border in the Irish sea.
"As it stands we cannot support this deal," the Labour leader told reporters in Brussels, adding that it did not seem to have the backing of "many of his allies on his own backbenches".
North Durham Labour MP Kevan Jones said: "It's a bad deal for the UK and the North East economy. I will be voting against the deal."
Labour is also expected to back proposals for a second Brexit referendum if a vote is held on Saturday.
