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If you're just joining us, Chancellor Philip Hammond is about to deliver his first Autumn Budget, where he will set out his plan for the UK's finances.

Theresa May is taking Prime Minister's Questions from MPs. Once that is finished, Mr Hammond will deliver his Budget speech.

House of Commons
Parliament

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Jeremy Corbyn notes that David Davis has said there should be free movement for bankers.

He asks if any other groups will have freedom of movement - "Nurses, doctors, teachers, care workers?"

Theresa May suggest that the Opposition leader has had to borrow questions from the Lib Dems.

Theresa May replies that new immigration rules will take account of the needs of the British economy.

She attacks Jeremy Corbyn for failing to decide if he wants to be in or out of the customs union.

"He needs to get his act together," she says.

BBC political editor Laura Kuenssberg tweets:

House of Commons
Parliament

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Jeremy Corbyn accuses the government of promising action on the Irish border, workers' rights, environmental protections and tax avoidance but fails to deliver.

Isn't it the truth that this government has no plan to deliver a good Brexit for Britain? he asks.

It was the Labour Party who refused to allow tax avoidance measure to go through responds Theresa May.

Conservatives are building a Britain fit for the future. Labour are offering a "blast from the past".

A quick look at the financial markets before the Budget begins.

London's FTSE 100 share index is 0.5% higher at 7,451 points, while the pound is flat against the dollar and euro, trading at $1.32 and €1.12 respectively.

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Wesminster tradition dictates that the Budget is the only time alcohol is allowed in the chamber of the House of Commons.

Benjamin Disraeli is said to have had a brandy with water as his despatch box tipple. His great Victorian rival, William Gladstone, preferred sherry with a beaten egg.

But chancellors have become much more abstemious in recent years.

The last chancellor to bring in a Budget tipple was Ken Clarke (pictured) in the 1990s, who liked Scotch whisky (Glenfarclas) for his speeches.

Laura Kuenssberg
BBC political editor

Crucially there will not be extra cash for public sector pay in the Budget - but there will be extra cash for the NHS.

How much is not clear, certainly not the £4bn requested by NHS boss Simon Stevens.

But if the decision makers within the NHS go for increased pay for nurses, that extra money will be swallowed up.

Prime minister's questions are under way in the Commons, with the chancellor following at about 12:30.

ITV News

ITV political editor Robert Peston drills down, external into where Philip Hammond's Budget tweaks might come.

He suggests there could be cash for nurses' pay - but tied to reforms; perhaps changes the rules to let councils borrow to build housing once more; and even cutting the VAT threshold could also be up the chancellor's sleeve.

Overall, though, he predicts "dull", rather than "bold", to be the order of the day.

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Yes, for more than 20 years the chancellor has delivered his plans for the UK's public finances in the Spring - usually in March.

Philip Hammond announced last year he would instead deliver the Budget in the Autumn, giving MPs longer to scrutinise the Budget before the new tax year starts in April.

The last chancellor to give an Autumn Budget was the Conservatives' Ken Clarke in 1996. When Labour won the election the following year, the new chancellor, Gordon Brown, opted for a Spring Budget instead.

Not long to go now, but here's a quick reminder of the territory Philip Hammond will be covering in the Budget from BBC economics editor Kamal Ahmed.

Laura Kuenssberg
BBC political editor

What do you do if you're the chancellor and you have no majority to speak of, not much money to spend within the rules you have set for yourself, and you work for a prime minister who doesn't have very much authority?

Simple: your biggest job is to avoid screwing up.

But that won't be written on the first page of the chancellor's red book, or in the speech he'll carry in his red box.

Read more from Laura here.

There is a shout of "are you boxed in chancellor?" as Philip Hammond holds up the red box outside No 11 Downing Street before beginning his journey to Parliament to deliver his Budget speech in an hour's time.

Business editor Simon Jack and producer Ben King explain the productivity puzzle ahead of the Budget.

BuzzFeed's senior political correspondent notices a certain similarity on social media today:

Reality Check

It's been a year since Reality Check wrote this piece about what a ridiculously difficult job the Office for Budget Responsibility has making economic forecasts for the next five years.

Its chairman, Robert Chote, made it clear that he is not given any more information about post-Brexit plans than the rest of us, so there are going to have to be a few assumptions made about the outcome of the negotiations.

Also beware of suggestions in the next few days that the OBR has predicted a big Brexit dividend (read this piece before you believe that) and allegations that the OBR is too pessimistic (read this before you believe that).

Norman Smith
Assistant political editor

Our assistant political editor has been reading the "smoke signals" and says they indicate it's not going to be an "all-singing, all-dancing splash-the-cash sort of Budget".

"There are indications there is not going to be any more money for public sector pay," he says. On housing, there will be no "big bazooka" of billions to kick start a house-building programme.

And, although NHS boss Simon Stevens says he needs billions or the health service will be in serious difficulties, our correspondent says there will be some money, nowhere near the request.

"Cautious Phil has won out over carefree Phil and that will ring alarm bells in the Tory party," he says.