Image source, Reuters

A pivotal day in Brussels then - here's a recap of what happened.

The EU and UK reached a new withdrawal agreement, which has been hailed by European leaders as a significant step. But the deal still has to get past Parliament.

The deal ditches former PM Theresa May's backstop, the measure designed to prevent a return to physical checks on the Irish border. Instead it will, in effect, draw a new customs border down the Irish Sea.

Boris Johnson is insisting he is confident that MPs will back the deal when MPs sit on Saturday, even though his key allies, Northern Ireland's Democratic Unionist Party, plan to vote against it. Labour, the Liberal Democrats and the SNP also say they are opposed.

We are going to bring our live coverage to an end here - but our news story will continue to be updated with the latest developments.

And you can read about the revised deal in this piece from the BBC Reality check team.

Katya Adler
Europe Editor

If you have a look at Boris Johnson with the EU leaders there was a lot of back slapping, there was a lot of bonhomie.

And it completely belies the fact that, underneath, those EU leaders are very sceptical when the prime minister said to them "I've got the numbers in Parliament to pass this deal"...

Up their sleeve, of course, is the possibility of another Brexit extension. EU leaders today were very coy about that - they are not enthusiastic about the idea and they want to keep the pressure on MPs to really focus their minds.

But if this deal, like Theresa May's deal agreed with EU leaders, fails to get through the House of Commons, and if there were a request from the UK for another Brexit extension, then these EU leaders, after three years of Brexit process - two Brexit deals - are not going to turn around and say no to the UK if this extension would be for a general election, a second referendum or a referendum on this deal.

Newsnight

Veteran Labour MP Ronnie Campbell, who voted against Theresa May's deal three times and is standing down at the next election, says he is minded to back the PM's deal.

Asked whether he will back it at the vote on Saturday, he replies: "Yes, I think so".

"I think this country's just fed up the way Parliament's run this for the last three years," he says.

"It's time we got round the table, and got a deal, and got it through".

Boris Johnson's deal was a "triumph of negotiating", Commons Leader Jacob Rees-Mogg says in a video posted on Twitter by the Conservatives.

"As a long-standing Eurosceptic I'm really pleased with the deal," he says.

Image source, Conservative Party

Mark Field, the Tory MP for the Cities of London and Westminster, has announced he will not be standing in the next general election - citing disagreements over Brexit.

Mr Field says his beliefs "stand at odds with the current administration's impatient approach to getting Brexit done".

Mr Field, who was sacked as a minister for grabbing a Greenpeace activist in June, adds he would prefer the UK to remain "in or very closely aligned to the EU".

Read more here

The pound is trading up on the day - but a surge in the currency triggered by news of the Brexit agreement failed to last, amid concerns that the deal could still be scuppered.

Sterling rose to a five-month high against the dollar, coming close to $1.30, soon after the UK and EU's negotiating teams agreed a deal.

It then began to lose ground after the DUP said it would not vote for the deal and by early afternoon, sterling had fallen back below $1.28. It later regained momentum to trade at $1.2863, up 0.26% on the day.

There was a similar pattern against the euro. At first the pound jumped above €1.16, before falling back to €1.1576.