Image source, Steve Baker

Theresa May will face a fight for her leadership if 48 members of her own party put in writing that they have lost confidence in her.

If the chair of the 1922 Committee of backbench Conservatives - Sir Graham Brady - receives letters from 15% of the party's MPs, a secret ballot is triggered.

If Mrs May wins, they can not challenge her premiership for another year.

But, if she loses, there will be a leadership election and she will not be allowed to run.

You can see which MPs have written letters so far by clicking here.

Sean Curran
Parliamentary correspondent

The government confirmed last night that it will publish an economic analysis comparing the costs and benefits of its Brexit deal with those of the UK staying in the European Union.

A cross-party group of MPs had proposed an amendment to the Finance Bill calling on ministers to publish the forecasts.

A Treasury minister, Robert Jenrick, said MPs would be given the analysis before the meaningful vote on the final deal - looking at a no deal scenario, a free trade agreement and the government's proposed deal.

He said: "The analysis will consider the long term costs and benefits of moving to new trading relationships with the EU and the rest of the world.

"And having considered the amendment... I am happy to confirm that the baseline for this comparison will be the status quo, that is today's institutional arrangements with the EU."

Norman Smith
Assistant political editor

It has been clear since the withdrawal agreement was published that the DUP has been working pretty much hand-in-glove with Theresa May’s Brexit critics.

They have now opened up a new front in the pressure on Mrs May by threatening her parliamentary maths by withdrawing their support.

In practical terms, it would mean she couldn’t rely on getting legislation through because she wouldn’t have a Commons majority, and she would have to try and manage day-by-day, vote-by-vote, which is extraordinarily draining and difficult - making it nigh on impossible to get any contentious legislation through Parliament.

The DUP have for some days now been saying "our deal is not with Theresa May, our deal is with the Conservative Party" – in other words, if you get shot of Theresa May, well, everything can return to normal.

But I suspect within Downing Street, they have been reckoning that this was likely to happen.

Belfast Telegraph

Image source, Getty Images

Theresa May says the withdrawal agreement "strikes the balance" of keeping trading and security links with the EU, whilst becoming independent.

In an opinion piece in the Belfast Telegraph, external, the prime minister continues to try and sell her deal to the public, saying it also puts Northern Ireland "in a fantastic position for the future".

She writes: "Throughout the Brexit process I have kept the prosperity and security of Northern Ireland, and our entire United Kingdom, at the front of my mind.

"The draft deal published last week protects jobs and businesses, keeps us safe, and preserves the integrity of our Union, whilst respecting the result of the referendum."

Mrs May warns that a no deal scenario would be "especially challenging for Northern Ireland" but, with this deal, the UK has "made a critical step towards avoiding this outcome".

And she tries to allay fears over the backstop, promising it is an "acceptable insurance policy" and "expressly temporary".

"I am determined to do my job and deliver the best deal possible," she concludes.

"It will then be time for MPs to do their job and to choose: move forward with this deal in the national interest, or go back to square one with all the chaos that would entail."

As the debate over Brexit and the union grows, some politicians stress their unionist credentials.

BBC Breakfast

Justice Secretary David Gauke has told his Conservative colleagues that ousting the prime minister would be "self-indulgent and dangerous".

Speaking to BBC Breakfast, he said: "The idea that at this point, in the middle of a very delicate negotiation - that is hugely important to the future of this country - that we should remove the prime minister, essentially leave us leaderless for, certainly several weeks, possibly months, would be hugely irresponsible.

"And, what the country, I think, would expect from the Conservative Party is that we get behind our prime minister and make sure that she can deliver a good deal for the country.

"That's what we are on course to do and I don't think people should be talking about removing her at this point.

"I think that would be self-indulgent and dangerous for the country."

Image source, AFP/Getty Images

The pro-Brexit European Research Group - headed by Jacob Rees-Mogg - will today launch a paper it claims "exposes 17 myths" about leaving the EU without agreeing Theresa May's deal.

The document discusses issues around checks at borders, World Trade Organization rules and supply chains.

It will launch at 10:00 GMT.

Expect questions from the press about the number of letters sent to the chair of the 1922 Committee calling for a vote of confidence in the PM...

Today Programme
BBC Radio 4

A senior executive from the Institute of Directors said the vast majority of members wanted Theresa May's deal to go ahead.

Allie Renison, the group's head of Europe and Trade Policy, said that a survey of 800 members found around 75% think it is "extremely important" for a withdrawal deal to get through Parliament to improve certainty.

Around two thirds said a no-deal Brexit would have a negative impact on their forms as they struggled with perparations for the scenario.

But the members were "pretty fairly split" on whether to have another referendum, with a "very small" lead of about 2% in favour.

Ms Renison told BBC Radio 4's Today programme: "Effectively it means that there is no real majority for reopening the discussion at this point at least.

"It's not a big priority compared to getting a withdrawal agreement through."

Image source, AFP/Getty Images

Scotland's First Minister, Nicola Sturgeon, will meet the prime minister and opposition leaders in Westminster later in a series of meetings to discuss Brexit.

The leader of the SNP is arguing for continued, permanent single market and customs union membership for the whole of the UK as an alternative to Theresa May's deal, and she intends to make her case in London - appealing for cross-party support.

Ahead of her visit, she said: "Brexit must not be a false choice between the deal the prime minister has presented and the no-deal outcome which even members of her own cabinet now say would be disastrous.

"This is a time for grown-up, responsible governance in the public interest - something which has been sadly lacking to date as the Tory party has continued to put its own interests ahead of the interests of jobs, communities and businesses.

"It mustn't be an option between frying pan or fire - but it is now incumbent on all of us who oppose that false choice to propose a workable alternative."

Today Programme
BBC Radio 4

Image source, AFP/Getty Images

Lord Peter Lilley, a leading Brexiteer who met with Theresa May yesterday, remained tight-lipped on whether those trying to oust her had overplayed their hand.

Pressed by John Humphrys on BBC Radio 4’s Today programme he would not discuss whether the PM should go or not.

But he said he believed a new deal "probably" could be negotiated in the next few months

Lord Lilley said free trade deals "normally take years" because of a difference in tariffs.

"But we start with zero tariffs, we should end with zero tariffs, tell me how that could take more than 10 minutes to negotiate?"

He said the second issue was rules and regulations, but again added: "We start with identical rules and regulations. How can that take very long to end up with identical rules and regulations?"

Victoria Derbyshire

What happens when two strong-minded individuals from opposite sides of the Brexit debate sit down for dinner? To find out, the BBC's Victoria Derbyshire programme has organised a series of blind dates.

Former Big Brother contestant Aisleyne Horgan-Wallace is pro-Leave.

Labour peer and fertility expert Prof Lord Winston believes the UK would be much better remaining in the EU.

They went into the meal without knowing whom they would be meeting.

But did they get on? Read our full report.

Image source, PA

Easyjet said it flew a record number of passengers over the year, up 10.2% at 88.5m, with total revenues up 16.8% to £5.9bn.

But the group said revenues per seat are set to fall in the first half of the new financial year, impacted by factors including the timing of Easter.

It said it is continuing to prepare for Brexit, operating via airlines in the UK, Switzerland and Austria to enable ongoing flying in Europe.

It said: "Both the EU and the UK have said that their objective is to maintain flights between the EU and the UK, whatever the Brexit outcome.

"This gives easyJet confidence that flying rights will be maintained, and it continues to work with EU institutions, EU member states and the UK to ensure that this is achieved."

The EU27 leaders are due to meet to endorse the Brexit withdrawal agreement on Sunday morning, according to the timetable set out by the European Council.

There is one small caveat - the meeting depends on the UK and EU sides both sticking with the plan as it has been drawn up.

But, "if nothing extraordinary happens, we will hold a European Council meeting, in order to finalise and formalise the Brexit agreement", Donald Tusk, President of the European Council, says.

And it should all be over in time for a press conference at noon in Brussels (which is, of course, 11am UK time).