This will be a large apportionment.

large levy rises, large borrowing, large spending.

And large politically – because it will set the political landscape for the years to arrive.

Chancellor Rachel Reeves will commitment that she will “invest, invest, invest” and will inform the Commons: “My conviction in Britain burns brighter than ever.

“More pounds in people’s pockets. An NHS that is there when you require it.

“An economy that is growing, creating riches and chance for all.”

Note the upbeat tone, after no shortage of the bleak from ministers recently.

The government is also emphasising that it is “protecting working people’s payslips” – which is code for National Insurance paid by employers, rather than employees, going up – one of the biggest rows of the last few weeks.

Expect Labour to try to use this apportionment to attempt to open up a political dividing line with the Conservatives – rather similar to the one Gordon Brown tried a decade and a half ago – where they advocate what they call “financing”, ie spending, and contrast that with what they will label the “decline” offered by the Tories.

Conservative chief Rishi Sunak – on his last large day in the job before his successor is elected on Saturday – will, unsurprisingly, strongly criticise the chancellor later.

“She’s called National Insurance a ‘jobs levy’ which ‘takes money out of people’s pockets’,” he says.

“And worst of all, she said the issue with National Insurance ‘is that it is a levy purely on people who leave to work and those who employ them’.

“Far from protecting working people she would be raising literally the only major levy that specifically hits working people.”

It is expected the Liberal Democrats will focus on social worry and the availability of GP and dentist appointments in their response to the apportionment.

It is 14 years and seven months since a Labour chancellor waved the apportionment Red Box on the step of 11 Downing Street.

Wednesday 24 March 2010 was the day of Alistair Darling’s third apportionment, delivered on the eve of an election campaign Labour would leave on to misplace.

Incidentally, what was the most expensive assess that day? A commitment, costing £600m, to boost the Winter Fuel Allowance for another year.

A Labour concept that would continue throughout the coalition and Conservative years of power, only to be cancelled for the vast majority of pensioners when Labour won again back in July.

For 800 years, men have run the country’s finances. There have been 110 chancellors since Sir Richard Sackville was appointed in 1559 – a centuries’ long unbroken line of blokes – which includes Henry Bilson Legge (three times chancellor in the 18th Century), and William Gladstone, who had four goes at it in the 19th Century.

Until, that is, the appointment of Rachel Reeves.

The Conservatives may have managed the first three female prime ministers, with Labour’s record currently zero, but the first apportionment from a female chancellor of the exchequer is a genuine instant of history.

So, what can we expect?

Well, the large stuff has been talked up in advance – through nods and winks, official briefings and unauthorised leaks.

There are levy rises, expected to include employer National Insurance and inheritance levy.

There is the transformation in the government’s self-imposed debt rules, so it can borrow a lot more.

There is the rise in the minimum wage.

There is money to rebuild schools in England.

And the plans for recent equipment for the NHS, such as scanners and radiotherapy machines.

Expect a lot of talk from Rachel Reeves about what she will call “choices”.

Her throng view it as a “once in a production” apportionment, where its scale, it is claimed, matches the scale of the test they face.

Which is code for the country’s in a mess and they ponder it’s going to expense a lot to fix it.

The extent to which it is – and whether billions of pounds more of taxpayers’ money are the answer – are the open questions.