The timetable for a second independence referendum could be in the hands of the UK government, Mike Russell says.

AMs will vote on whether they think the process to start Brexit should be triggered, the first minister confirms.

Theresa May says she recognises the "appetite" for a formal policy document setting out her plan.

After the Supreme Court rejects the government's Brexit appeal, what happens next?

Laura Kuenssberg
BBC political editor

Image source, HoC

It was only yesterday that the Brexit Secretary, David Davis, told MPs it just might all be a bit tricky to have a White Paper, a formal document outlining the government's plans for Brexit, and stick to the timetable they want to pursue.

Rebel Remainers though were "delighted"’, that, stealing Jeremy Corbyn’s thunder, a planted question from a loyal Tory MP at PMQs today produced in fact a promise from the Prime Minister that (after all) there WILL be a White Paper.

It is a climbdown, no question, a last minute change of heart.

Late last night Brexiteers were being assured there would be no bending, no delay to the government’s plans and no giving in to the Remainers.

Even early this morning, government sources were privately suggesting that they were quite happy to have the White Paper option up their sleeve, but there were no immediate plans to make that promise.

Then voila, at 12:05 GMT, the pledge of a White Paper suddenly emerged. As one senior Tory joked, "welcome to the vaccilation of the next two years".

For her critics this is evidence of weakness, that Theresa May's been pushed into changing her mind. 

It is what was described as a "massive, unplanned" concession. But it doesn’t seriously hurt the government. 

First off, it shows goodwill to the rebel Tory Remainers, many of who feel their Eurosceptic rivals have had the upper hand of late.

Schmoozing matters round these parts. It takes one of the potential arguments during the debates in the next couple of weeks that could have gathered pace off the table, before the Bill is even published.

And, rightly or wrongly, no one expects a White Paper will contain anything new that the Prime Minister has not yet already said. 

It’s largely a victory for the Remainers about process, rather than substance. 

It doesn’t’ need to change the government’s timetable, and today’s embarrassment of a climbdown might be worth the goodwill that Number 10 will get in return.

Well, that's Prime Minister's questions over with for another week. 

You can follow the rest of the day's developments in the Commons on our Westminster live page but here's a recap of the main stories so far.

• A white paper setting out the government's Brexit negotiating objectives will be published, Theresa May has told MPs
• The move has been welcomed by Labour and many Conservative MPs although the SNP said it was a "theatrical stunt"
• Jeremy Corbyn says the prime minister is offering Donald Trump a "blank cheque" on trade and other issues ahead of their meeting
• A man has been arrested over alleged threats made against Gina Miller - the woman behind the Brexit legal challenge
• David Cameron has called for more funding for dementia, as he was announced as the new president of Alzheimer's Research UK

BBC News Channel

The SNP's Tommy Sheppard says the announcement of a white paper was a "theatrical stunt" by the prime minister.

With David Davis having spent two hours on Tuesday downplaying the prospect of a formal Brexit policy document, he says today's development was a "major u-turn" and puts "Damascene conversions into perspective".

Image source, Reuters

DUP MP Nigel Dodds has suggested Jeremy Corbyn made an "appalling mistake" during Prime Minister's Questions when he stated that the police officer injured in North Belfast on Sunday night had been killed.

Mr Dodds described it "as one of the worst displays of crass ignorance that could be imagined".

"The idea that someone who sees himself as an alternative prime minister could be so out of touch to make such a basic and hurtful error is almost unbelievable," he said.

"At PMQs I was able to wish the officer a speedy recovery. Although he was not killed that certainly was not the murderous intention of the terrorists who shot him."

The World at One
BBC Radio 4

Policing minister Brandon Lewis says the white paper concession is a "recognition of what people are saying in Parliament" and that is a good thing.

He tells Radio 4's World at One that it is a sign of a government listening to Parliament but, even so, he believes this is a "Westminster bubble issue" and what the public wants is for the government to deliver on the referendum vote.

For Labour, shadow business secretary Clive Lewis says a white paper is a "discussion document" and could end up being fairly meaningless -  in effect Theresa May's Brexit speech "bound up" and handed over to Parliament.

The government should follow the spirit, not just the letter, of the Supreme Court ruling and that means giving MPs and peers a "real say", he adds. 

Norman Smith
Assistant political editor

The BBC's Norman Smith says that the publication of a white paper was a climbdown by the prime minister but, in many respects, a "clever" one.

The suspicion, he says, was that this was something that Theresa May was always going to grant - given the support for it on the Tory benches and the government's relatively small minority.

By delivering it, the prime minister keeps Tory MPs "on board" and takes the sting out of opposition attacks, he adds.

During PMQs, Jeremy Corbyn asked when the government was planning to publish its White Paper on Brexit.

Theresa May didn't provide a date, but speaking afterwards, her official spokesman says it will arrive "in due course".

BBC Radio 5 live

House of Commons
Parliament

During the course of Prime Minister's Questions, Labour leader Jeremy Corbyn erroneously said that the Northern Ireland police officer, who was shot at the weekend, had died.

DUP MP Ian Paisley raises a points to clarify that the police officer in question did not die and asks if a Labour spokesperson can correct the statement. 

Speaker John Bercow replies that there is "no need for any further correction" adding that "it was an error".

Laura Kuenssberg
BBC political editor

This was one of the ideas that people from all parties were able to gather around. 

It's difficult to see what they can do next to put pressure on the government.

Laura Kuenssberg
BBC political editor

This is a climbdown by the government. Yesterday, the Brexit secretary said it would be too difficult to produce a White Paper in time.

Maybe it was felt it was necessary to deliver some kind of gesture. One senior Tory has just said to me: "Welcome to the vacillation of the next couple of years."

House of Commons
Parliament

House of Commons
Parliament

Image source, HoC

Former Labour leader Ed Miliband gets a big cheer as he stands to ask what may be his first question at PMQs since he resigned in May 2015.

The Speaker jokes that Mr Miliband probably didn't realise he was that popular - to which the backbencher says it reminds him of the old days...

And then he moves on to the substantive question.

He says the PM carries a "huge responsibility" in being the first leader to visit Donald Trump. He urges her to assure the US president that climate change is not a "hoax invented by the Chinese".

Theresa May says she hopes all parties will continue to implement the Paris agreement on climate change.

And that ends PMQs for today.