Sammy Wilson from the DUP - which plans to vote against Mr Johnson's deal later - says he hopes some members of the European Research Group of Tory Brexiteers will be convinced to reject the deal too.

"I know that the people in the ERG are good friends of Northern Ireland.

"They're not anti-unionist by any means.

"A lot of them are struggling with their consciences."

House of Commons
Parliament

The PM says he has "complete faith" in the Commons to decide environmental and workers' rights protections after Brexit.

Amid hollering from the opposition benches, Speaker John Bercow calls for quiet.

Reality Check

Image source, Getty Images

The PM has been outlining the changes that are in the new Brexit deal, which he says will allow the UK "to take back control".

You can read our guide to the revised Brexit deal here.

House of Commons
Parliament

The people of Northern Ireland will have the right to "express their consent" or otherwise for the provisions in the deal, Boris Johnson says. Brexit will allow the "exciting enterprise" of building a new relationship between the UK and EU, he tells the House of Commons.

Mark Francois, the deputy chairman of the European Research Group, made up of Tory Brexiteers, says it is "not a Stalinist organisation" and it's "ultimately up to every colleague to look into their own hearts and decide what is best for the future of our country".

There was an ERG meeting this morning where members were urged to back Mr Johnson's deal.

Mr Francois adds that "no-one" in the ERG meeting said they would vote against the deal.

House of Commons
Parliament

Brexit will allow the UK to "take back control", Boris Johnson says, and benefit "the whole country, including Northern Ireland". His deal "respects sensitivities" over the Irish border, he argues. The customs arrangement in the deal ensures "unfettered access" of Northern Irish goods to the rest of the UK, he says.

House of Commons
Parliament

The PM says his deal will allow a "new way forward", letting the UK leave the EU, while maintaining the "closest ties of friendship and co-operation". He thanks EU leaders for being "flexible" in re-opening discussions.

Norman Smith
Assistant political editor

No 10's move means, if the Letwin motion passes, the day becomes almost meaningless.

It would put no-deal back on the table from the government's point of view.

They would argue that the House of Commons has not agreed anything today and we are now heading towards leaving on 31 October without an agreement.

But opponents would say, hang on a sec, that means the Benn Act kicks in, which means Boris Johnson has to write a letter to the EU asking for a delay.

Which means, I suspect, Mr Johnson metaphorically would end up in the courts.

What we do not know is how Mr Johnson will deliver on his pledge to take us out come what may on 31 October.

He says he will abide by the law - but those two things seem contradictory.

Either the PM has some cunning legal ruse to get through the Benn Act, or he is going to tough it out?

House of Commons
Parliament

Boris Johnson says "this is the moment" the Commons can reach agreement on Brexit. He tells MPs they have debated the issue in "almost entirely practical terms". Mr Johnson says a more ideological debate is "largely absent" in the UK and that "with half our hearts" people feel a "sense of love and respect" for other European countries.

It's time to "move on and build a new relationship" with Europe, the PM adds.

If the Letwin amendment passes (read more on that amendment here) No 10 plans to cancel the vote on the deal and send MPs home.

House of Commons
Parliament

Boris Johnson thanks House of Commons staff for allowing the first Saturday sitting of MPs in 37 years. And for making people miss the end of the Rugby World Cup quarter-final between England and Australia.

House of Commons
Parliament

Here we go. The House of Commons is packed. Prime Minister Boris Johnson is beginning his statement. MPs will ask questions after he finishes speaking and the main debate on the government proposals will follow that.

Speaker John Bercow says he has accepted ex-Tory MP Oliver Letwin's amendment to the government's motion.

BBC News Channel

David Shiels of Open Europe, a think tank focussing on the UK-EU relationship after Brexit, says having a deal is better for the economy than if the country leaves without an agreement.

He tells BBC News: “Ultimately the economic impact of Brexit will be decided by the future relationship with the EU.”

He adds: “The fact there is a Brexit deal is better for the economy than a no-deal Brexit. Having a deal and having a deal passed by Parliament will be better… than having no-deal.”

Image source, AFP/Jessica Taylor/UK Parliament

Today's extremely rare Saturday sitting of Parliament will see MPs vote on Boris Johnson's Brexit deal.

Very shortly, Mr Johnson will make a statement to the Commons.

He is expected to take questions on his Brexit deal from MPs for a couple of hours.

The main debate on the deal will follow and voting is likely to begin after 14:30 BST.

There are three amendments which have been tabled. Two are from the SNP:

• An amendment to revoke Article 50 and cease the Brexit process, tabled by Angus MacNeil.
• An amendment from the SNP's Westminster leader Ian Blackford rejecting the new Brexit deal and calling for an extension until at least 31 January 2020 to allow for an early election

The third amendment has cross-party support, increasing its chances of being selected:

• An amendment from former Tory MP Oliver Letwin to withhold House of Commons approval of the deal until the legislation to implement the agreement is passed.

No 10 says if the Letwin amendment passes, therefore changing Mr Johnson's proposed deal, then MPs will be sent home and not asked to vote on the deal.

Laura Kuenssberg
BBC political editor

A Number 10 source says: "A vote for Letwin is a vote for delay and the whips will send everyone home.

"A vote for Letwin means MPs voting to render the entire day, that they demanded, meaningless.

"It would perfectly sum up this broken Parliament.

"But the government will not negotiate delay - we will continue to argue that Britain and Europe should reject delay and force MPs to choose between this deal and no deal.

"And we will introduce the legislation on Monday so we can get Brexit done on 31 October."

Another member of the European Research Group of Conservative Brexiteers gives his backing to the deal.

Bernard Jenkin appeared to confirm that he and the rest of the group would be backing the deal.

He tweeted:, external "This deal is hundreds of miles from perfect. It has terrible elements, but we are where we are.

"At least [Boris Johnson] has substantially improved it and it now points in a far more positive direction for our country."

BBC News Channel

Conservative MP Stephen Crabb says he will not support Oliver Letwin’s amendment.

He says: “I am not going to back the Letwin amendment because what I want from today is to provide some kind of clarity and certainty for the public and for business.

“The job of today is to give a clear indication – yes, no – to the deal that Boris Johnson, rather unexpectedly some might think, got with the EU.”

“We need more clarity,” he adds.

Political correspondent Ross Hawkins says Oliver Letwin has "every reason to be confident" that his amendment could pass.

Mr Letwin's amendment would withhold official approval of the deal until the legislation to implement the agreement is passed - and in the meantime force Boris Johnson to ask the EU for a delay.

Mr Letwin is doing this because he's concerned some MPs who vote for it might change their mind as the legislation passes through Parliament - or it could be held up in the House of Lords.

Read more on the Letwin amendment here.

Today Programme
BBC Radio 4

The BBC's Ross Hawkins says one "very well plugged-in Labour figure" has suggested there could be 10 or more Labour votes for the deal.

But "that very well may not be enough", our correspondent adds.

Here's more on the numbers.