Image source, House of Commons

Philip Hammond says the vote to leave the EU has "undoubtedly" slowed down business investment decisions in Britain. 

The chancellor told MPs that Brexit had created a climate of uncertainty which had had an effect on the British economy. 

And he warned the country faced long-term challenges over how to tackle its productivity gap, which meant that a worker in Britain took five days to produce what a German did in four. 

He made the comments in the Commons before MPs were asked to approve the updated Charter for Budget Responsibility, which was first unveiled in last year's Autumn Statement. 

Reaction to the Supreme Court ruling that the government does not have to consult Northern Ireland to trigger Brexit.

Laura Kuenssberg
BBC political editor

Sources have told the BBC the bill to trigger Article 50 will be introduced to Parliament this Thursday, with an expectation that it could be concluded in the Commons in a fortnight.

Parliament must vote on whether the government can start Brexit, the Supreme Court rules.

Westminster should listen to the assembly before triggering the Brexit process, the Welsh Government's top law officer says.

Speaking on the BBC's Newshour, constitutional law expert Dr Alan Renwick discusses why the Brexit court case turned out to be so controversial.

He says the courts were "upholding democracy" but that parts of the press found this "unfamiliar and annoying".

Looking to explore more about today's judgement and what it will mean? Here's a reading list:

• We know what the judges think - but what happens next?
• Laura Kuenssberg says the government will be relieved, despite losing its appeal.
• Investment manager Gina Miller became the face of the Brexit legal challenge. Here's a profile of her.
• Here's a guide to the 11 judges who ruled on the historic case.
• The BBC's Reality Check asks whether the ruling will delay Brexit.
• More on the reaction from the Scottish government...
• And an all-encompassing guide to everything you need to know about Brexit.

BBC News Channel

• The Supreme Court has ruled that the government cannot begin the formal process of leaving the European Union without a vote in Parliament. 
• Ministers had appealed against an earlier High Court decision, arguing that they already had the authority to trigger Article 50. The businesswoman Gina Millar - who led the legal challenge against the government - said the ruling meant that MPs would rightfully have a say on Brexit. 
• The government has promised draft legislation within days and Brexit Secretary David Davis spent the best part of two hours being quizzed by 84 MPs about the proposals.
• He said today's ruling would not derail the government's plans to trigger Article 50 before the end of March. And he was forced to bat away umpteen requests from all sides to publish a white paper giving further details on its plans.
• Labour has said it won't frustrate the process - but wants MPs to vote on the deal the government agrees with the EU - before it is signed off.
• But the party's former home secretary David Blunkett warned the Lords not to end up in a head-to-head confrontation with the British public by trying to block the Article 50 bill.
• Meanwhile, Scotland's First Minister, Nicola Sturgeon, has said she is "disappointed" that the Supreme Court ruled that ministers do not need to consult the devolved administrations before triggering Article 50.
• Ms Sturgeon said it showed the devolution settlement was "not worth the paper it was written on". The Welsh government said it welcomed today's judgement - adding it was vital that Theresa May reflected the interests of Wales in her Brexit negotiations.

Tom Brake, the Liberal Democrats' foreign affairs spokesman, has said he doesn't think the Supreme Court ruling that Parliament must trigger Article 50 will "jeopardise" the government's timetable for leaving the EU.

"What it does do, is ensure that instead of the government simply railroading this through, and Theresa May deciding what is best for our relationship with the EU in the future - actually it's something parliament can be involved with, and gives an opportunity for the people to feed into the process. That was going to be denied until the Supreme Court said otherwise."

UKIP MP Douglas Carswell responded: "I don't think you'll succeed in frustrating the will of the people, but I do think you undermine the possibility that we might create that new mood of national cohesion that we need."

Brake added: "I'm not seeking to frustrate the will of the people.What I'm seeking to do is ensure our new relationship with the EU is one that does not damage very heavily major sectors of industry around the UK."

Tom Bateman
Political Correspondent, Millbank

Downing Street has declined to say whether the government's Brexit plan will be presented in an official policy document known as a white paper.

After the Supreme Court ruling, a number of MPs called for such a document to allow a more substantive debate in Parliament.

Asked repeatedly if a white paper was ruled in or out, the prime minister's official spokesman said only that Theresa May had already made clear her plan.

He said:

The spokesman also reiterated ministers' view that MPs will be given the chance for "many votes" throughout the period of negotiations.

It follows calls for MPs to be given a vote on a final deal before it is signed by Mrs May. 

Select Committee
Parliament

Conservative MP Andrew Selous asks about the topical issue of air quality and the EU legislation that regulates it.

Jeremy Hunt says he is confident the UK can take these decisions on a "sovereign basis" and says an elected UK Parliament can ensure we have good air quality. 

Read more about the issue of air quality here.

Image source, Getty Images

East Antrim MP Sammy Wilson, from the Democratic Unionist Party which campaigned for Brexit, said it would have been "totally irrational" to have the devolved administrations "dictate the direction in which the nation should go after such a clear and decisive vote".

"The battle now commences at Westminster and as far as the DUP is concerned, we will be using our votes and voice to ensure a rapid commencement on the negotiations to leave the EU," he added.

Sinn Féin leader Gerry Adams said the judgments underlined the "importance of the Irish government's role in defending the rights of Irish citizens in the north".

"Brexit will undermine the institutional, constitutional and legal integrity of the Good Friday Agreement," he said.

Sinn Féin's new leader in the north, Michelle O'Neill, meanwhile, said the judgment that the Assembly did not need to be consulted before the UK government triggered article 50 ignores the wishes of the majority of people in Northern Ireland.

Read more

The Welsh Government is claiming victory in the Supreme Court despite judges

House of Lords
Parliament

Liberal Democrat Baroness Kramer asked why the government "was so afraid" that it would not be putting the final Brexit deal back to the British people for their vote.

She asked if ministers dared not hold a second EU referendum because they feared the British people would be disappointed and feel betrayed.

Brexit minister Lord Bridges of Headley disagreed, adding that he did not think there would be any sense of betrayal from listeners to the prime minister's speech.

The Welsh Assembly does not have to be consulted on triggering Brexit, the Supreme Court rules.

House of Lords
Parliament

Crossbencher Lord Kilclooney, former Ulster Unionist Party MP John Taylor, asks what the government's policy is "when" the European Parliament rejects a Brexit deal with the UK.

Exiting the EU MInister Lord Bridges says the peer is "jumping ahead and making a big presumption there".

UKIP peer Lord Pearson of Rannoch urges the government to be "ready to flex its muscles if the European Parliament behaves as unreasonably as it usually does".

Lord Bridges says the government does not intend to "ignore" the Article 50 process, which allows two years for negotiations and "has not even begun".