Bookmakers have slashed the odds on MPs rejecting Boris Johnson’s Brexit deal this afternoon, according to comparison website Oddschecker.

The odds of the government losing are now 1/2, while the chances of it passing are put at 6/4.

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Shadow Brexit secretary Sir Keir Starmer says that, once the UK moves out of alignment with the EU, trade will be more difficult. The UK would move towards a US-style "deregulated" model, with statutory rights to shorter holidays for workers, he adds.

House of Commons
Parliament

Anna Soubry, leader of the Independent Group for Change, says there's a "danger" MPs are "being bounced" into a "terrible decision" for the country. She calls for more scrutiny of the government's plans.

Reality Check

Shadow Brexit secretary Keir Starmer says he fears the UK could leave the EU on WTO terms.

But what does that actually mean?

You can read BBC Reality Check's guide here.

Norman Smith
Assistant political editor

Image source, UK Parliament/Jessica Taylor

We seem to have moved from "super Saturday" to "so what next Saturday".

Interesting twist, though, in the last half an hour. You wonder whether the Letwin amendment is actually going to get the numbers.

We heard from Alistair Burt who's been one of the Tory rebels - very critical of Boris Johnson - saying he couldn't back the Letwin amendment.

We've heard too from Caroline Flint, Labour MP, also attacking the Letwin amendment and the Benn bill. So presumably she won't vote for it either.

It opens up the possibility that if the Letwin amendment doesn't get through, then it's game on for Boris Johnson, it's game on for his big vote on his deal.

I suspect he will feel if he can see off the Letwin amendment, maybe he can get his deal across the line.

If he doesn't, then we're told he'll send MPs home, he'll simply pull the vote, there won't be a meaningful vote today.

Then everyone will come back on Tuesday, we're told for another crack at this.

House of Commons
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Shadow Brexit secretary Sir Keir Starmer says the deal will damage the UK's manufacturing sector. Management and unions don't want to leave the European customs union, he adds.

It's also "the weakest of weak deals" for the services sector, Sir Keir tells MPs.

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Brexit Secretary Steve Barclay says the deal "ensures we move forward as one union of the United Kingdom". It would be a "failure" if MPs didn't back it, he adds. He sits down.

Labour MP Anna Turley says Mr Barclay's earlier use of the late Mo Mowlam's comments was an "abuse".

Now it's shadow Brexit secretary Sir Keir Starmer's turn to speak.

A seat in the House of Commons public gallery seems to be the hot ticket this Saturday.

The Institute of Directors surveyed 650 business leaders and just over half said MPs should approve the deal, while 41% think it should be rejected.

"The Brexit process has been frustrating and wearying for our members," says director general Jonathan Geldart.

"The paralysis of the current situation prevents directors from moving forward with plans for investment and growth.

"By no means is there unanimity among business leaders on the path ahead, but avoiding a disorderly exit at the end of the month comes out clearly as a pressing priority.

He added businesses across the UK have "legitimate concerns around the changes agreed for Northern Ireland".

Labour confirms the party will back the Letwin amendment in the Commons.

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Tory Mark Francois says the European Research Group of Eurosceptic Conservatives - many of whom rejected Theresa May's agreement with the EU - "overwhelmingly" backs the PM's deal. Brexit Secretary Steve Barclay says this shows the deal is "for everyone".

The People's Vote march is due to start at midday in central London, beginning on Park Lane before heading to Parliament Square.

By Saturday morning, more than £500,000 had been donated to support the protest.

Image source, Reuters

Image source, Getty Images

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Labour MP Caroline Flint - who is backing the government's motion - calls Sir Oliver Letwin's amendment a "panic measure" that shows "no confidence" that the UK can leave the EU by 31 October. Tory MPs cheer her for that - her own side of the Commons is quieter.

Independent MP Nick Boles - who quit the Conservative Party earlier this year - tweets:, external "Some mischievous speculation that Oliver Letwin might be persuaded to pull his amendment."

But it's unlikely, he suggests, adding: "He will forgive me for observing that there is more chance of him being called up to the England rugby team."

House of Commons
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Independent MP Dominic Grieve says the House has a "duty to look in detail" at the deal. He adds that the government is giving the impression that Brexit should happen with "such a gallop" that this is not possible.

But Tory MP Sir Bernard Jenkin says plans have not "lacked" attention and scrutiny.

Katie Wright
BBC News reporter

Crowds have been gathering on Park Lane in central London ahead of the People’s Vote march to Parliament, which gets under way at noon.

Ali Lothian, 60, and Mettje Hunneman, 49, travelled from Dundee and Edinburgh respectively overnight to join the protest.

Ali says it’s the last chance to show how strongly she feels about having another vote.

“It’s a big commitment - it’s a whole weekend," she says.

"But I regretted not coming last time. This time it was a no-brainer.”

Mettje says the fact Parliament is sitting as well makes it “a momentous day”.

“I would not feel comfortable sitting at home - I’ve got pals who have got a gig tonight but I just couldn’t be there.”

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The prime minister was told a new deal was "impossible" but still managed to reach one, Brexit Secretary Steve Barclay tells MPs. The UK and EU have a shared interest in a good relationship in the future, he adds.

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The government has shown "flexibility" to address concerns over the impact of Brexit on the Good Friday Agreement, Brexit Secretary Steve Barclay says.