"Of course, we're looking at tax and spending as well," the chancellor said when asked how she would deal with the country's economic challenges in her 26 November statement.
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Ms Reeves was shown the first draft of the Office for Budget Responsibility's (OBR) report, revealing the size of the black hole she must fill next month, on Friday 3 October.
She has never previously publicly confirmed tax rises are on the cards in the budget, going out of her way to avoid mentioning tax in interviews two weeks ago.
Cabinet ministers had previously indicated they did not expect future spending cuts would be used to ensure the chancellor met her fiscal rules.
Ms Reeves also responded to questions about whether the economy was in a "doom loop" of annual tax rises to fill annual black holes. She appeared to concede she is trapped in such a loop.
Asked if she could promise she won't allow the economy to get stuck in a doom loop cycle, Ms Reeves replied: "Nobody wants that cycle to end more than I do."
She said that is why she is trying to grow the economy, and only when pushed a third time did she suggest she "would not use those (doom loop) words" because the UK had the strongest growing economy in the G7 in the first half of this year.
What's facing Reeves?
Ms Reeves is expected to have to find up to £30bn at the budget to balance the books, after a U-turn on winter fuel and welfare reforms and a big productivity downgrade by the OBR, which means Britain is expected to earn less in future than previously predicted.
Yesterday, the IMF upgraded UK growth projections by 0.1 percentage points to 1.3% of GDP this year - but also trimmed its forecast by 0.1% next year, also putting it at 1.3%.
The UK growth prospects are 0.4 percentage points worse off than the IMF's projects last autumn. The 1.3% GDP growth would be the second-fastest in the G7, behind the US.
Last night, the chancellor arrived in Washington for the annual IMF and World Bank conference.
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'I won't duck challenges'
In her Sky News interview, Ms Reeves said multiple challenges meant there was a fresh need to balance the books.
"I was really clear during the general election campaign - and we discussed this many times - that I would always make sure the numbers add up," she said.
"Challenges are being thrown our way - whether that is the geopolitical uncertainties, the conflicts around the world, the increased tariffs and barriers to trade. And now this (OBR) review is looking at how productive our economy has been in the past and then projecting that forward."
She was clear that relaxing the fiscal rules (the main one being that from 2029-30, the government's day-to-day spending needs to rely on taxation alone, not borrowing) was not an option, making tax rises all but inevitable.
"I won't duck those challenges," she said.
"Of course, we're looking at tax and spending as well, but the numbers will always add up with me as chancellor because we saw just three years ago what happens when a government, where the Conservatives, lost control of the public finances: inflation and interest rates went through the roof."
Blame it on the B word?
Ms Reeves also lay responsibility for the scale of the black hole she's facing at Brexit, along with austerity and the mini-budget.
This could risk a confrontation with the party's own voters - one in five (19%) Leave voters backed Labour at the last election, playing a big role in assuring the party's landslide victory.
The chancellor said: "Austerity, Brexit, and the ongoing impact of Liz Truss's mini-budget, all of those things have weighed heavily on the UK economy.
"Already, people thought that the UK economy would be 4% smaller because of Brexit.
"Now, of course, we are undoing some of that damage by the deal that we did with the EU earlier this year on food and farming, goods moving between us and the continent, on energy and electricity trading, on an ambitious youth mobility scheme, but there is no doubting that the impact of Brexit is severe and long-lasting."
That limit is hotter and sooner than most of the previous official advice, and is worse than the 1.5C level most of the world has been trying to stick to.
What is the 1.5C temperature threshold?
Under the 2015 Paris Agreement, countries agreed to try to limit warming to "well below" 2C - and ideally 1.5C.
But with global average temperatures already nearing 1.4C, warnings that we may have blown our chances of staying at 1.5C have been growing.
This new warning from the government's top advisers, the independent Climate Change Committee (CCC), spells out the risk to the UK in the starkest terms yet.
In a letter today, the CCC said ministers should "at a minimum, prepare the country for the weather extremes that will be experienced if global warming levels reach 2C above pre-industrial levels by 2050".
It is the first time the committee has recommended such a target, in the hopes of kickstarting efforts to make everything from flooded train tracks to sweltering classrooms more resilient in a hotter world - after years of warnings the country is woefully unprepared.
How climate change affects the UK
The UK is already struggling to cope with the drought, flooding, and heat brought by the current 1.4C - "let alone" what is to come, the advisers said.
Just this year, the country battled the second-worst harvest on record and hottest summer ever, which saw an extra 300 Londoners die.
"Though the change from 1.5C and 2C may sound small, the difference in impacts would be substantial," CCC adviser Professor Richard Betts told Sky News.
It would mean twice as many people at risk of flooding in some areas, and in southern England, 10 times as many days with a very high risk of wildfires - an emerging risk for Britain.
The experts said the mass building the government is currently pushing, including new nuclear power stations and homes, should even be adaptable for 4C of warming in the future - a level unlikely, but which cannot be ruled out.
Is it too late to stop climate change or limit to 1.5C?
The CCC's Baroness Brown said in a briefing: "We continue to believe 1.5C is achievable as a long-term goal.
"But clearly the risk it will not be achieved is getting higher, and for risk management we do believe we have to plan for 2C."
World leaders will discuss their plans to adapt to hotter temperatures at the COP30 climate summit in Brazil in November.
Professor Eric Wolff, who advises the Royal Society, said leaders needed to wake up.
"It is now very challenging even to stay below two degrees," he told Sky News.
"This is a wake-up call both to continue reducing emissions, but at the same time to prepare our infrastructure and economy for the inevitable climate changes that we are already committed to."
Shabana Mahmood is hosting counterparts from the Western Balkans and other European allies in London, and will demand greater international co-operation to tackle small boat crossings.
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The summit is designed to ensure nations on the continent strike new deals to tackle illegal migration, following Britain's "one in, one out" agreement with France signed earlier this year.
Calling for a "joined-up" response to the challenge, Ms Mahmood will say "coming together as we are today […] will make all of our borders and our countries stronger".
In the meantime, however, the government has failed "to bring order to our borders".
"The citizens of each of our countries have a very simple expectation of us," Ms Mahmood will say.
"The public rightly expect their government will be able to determine who enters their country, and who must leave.
"Today, in this country, and I know in many if not all of yours, that is not the case.
"And the failure to bring order to our borders is eroding trust not just in us as political leaders, but in the credibility of the state itself."
The Western Balkans is a major transit route for people smuggling across borders, the Home Office says, with some 22,000 people transported last year.
Many of the asylum seekers who cross the Channel had ended up in France via several other European countries, journeying across the continent after leaving their homes in parts of Africa and the Middle East.
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Today's summit of European ministers will include representatives from Albania, Bulgaria, Germany, Greece, Kosovo, Poland, Serbia, and others.
Ms Mahmood will reject the approach of those she will say "turn inwards" to deal with immigration, as both the Conservatives and Reform tout the prospect of leaving the European Convention on Human Rights.
But Tory shadow home secretary Chris Philp dismissed the tone of Ms Mahmood's speech, pointing to the record numbers of migrants crossing the Channel this year.
The increase, and the use of hotels to accommodate them, drove anti-immigration protests across the UK over the summer months. The government wants to close all such hotels by the next general election.
In addition to trying to tackle people smuggling, ministers have also announced policies to bring down legal immigration, with a requirement to learn English to A-level standard outlined in parliament on Tuesday.
"If you come to this country, you must learn our language and play your part," Ms Mahmood said.
It's expected to come into force after 4 November.
Captains of the 20 clubs are understood to back the move, although players could decide individually to opt out.
The majority of Women's Super League teams recently decided against taking the knee in games marking Black History Month, feeling it was no longer meaningful amid a rise in racism.
Sky News revealed last week that online racism cases in English football have quadrupled this season.
And in his exclusive interview, Mr Masters raised concerns about the anonymity of social media users posting abuse and questioned whether identity checks were now necessary.
The Premier League wants platforms to do more to change algorithms to stop players seeing the abuse, and to introduce additional protections to stop it reaching their inboxes.
Football frames racism as a societal problem - requiring education - and Sky News accompanied Mr Masters on a school visit in west London, where the Premier League linked up with Brentford.
Taking the knee
This weekend's matches will highlight the league's "No Room for Racism" campaign to combat discrimination and promote equality.
It was in 2020, inspired by the Black Lives Matter movement, that Premier League players started to take the knee before kick-off.
But questions about the effectiveness of the gesture have grown.
"It's always been their choice," Mr Masters told Sky News of the players. "It's never been something that has been forced upon them, either collectively or individually. They had another discussion in the summer.
"They're going to do it really at the No Room for Racism match rounds. We then decide whether they want to continue or stop. So I think they want to make sure whatever they do, it's effective."
'You'll be dealt with'
This is a season that began with Bournemouth's Antoine Semenyo reporting being racially abused at Liverpool, although Mr Masters said "the protocols worked".
He added: "A lot of our players and participants, managers, referees are subject to abuse, a lot of it racism.
"And we're trying our best to deal with that, working with our stakeholders and working with the social media companies to try to solve those issues."
For the league, that is not symptomatic of racist abuse becoming more prevalent in stadiums.
"The Premier League is a very permissive environment," Mr Masters said. "Very few other places you can come and scream and shout and support your team.
"But I think that fans know where that line is. No violence, no threatened intimidation, and no discrimination. If you do, then you'll be dealt with."
Polarised society
The political climate can become problematic, although Mr Masters does not directly reference the summer's anti-immigration protests when asked.
"Those are political issues, and I think that football's role is to provide that distraction," he said.
"Football stands slightly to the side to where society is at the moment, where we are seeing a little bit of polarisation of views. Football, I think, can help in that aspect."
Social media anonymity
Too many feel they can hurl racist abuse at footballers on social media - and Mr Masters insists the league is "very restless" about eradicating that.
Greater identity checks could help.
Mr Masters said: "There's an anonymity to it, I think, which, perhaps wrongly, in my view, gives people the view that they can pretty much say and do what they want.
"And I just simply don't think it should be part of a professional footballer's life to have to put up with this sort of stuff, which is why we're taking what action we can.
"Obviously, anything that makes it easier [to find the perpetrators] I would be in principle supportive of, but I think it goes to a lot of other issues around freedom of information."
AI and algorithms
There is a unit at the Premier League dedicated to pursuing social media firms over racist abuse, which has no complaints publicly about the conduct of the tech giants.
But the league's director of content protection, Tim Cooper, told Sky News: "The platforms can do more by changing their algorithms, looking at the opting in to see abuse rather than perhaps opting out of seeing it. That would be a step in the right direction.
"And ultimately, it's for us to keep trying to push cases through and get good real-world deterrent actions, alongside law enforcement and other enforcement bodies around the world."
There are concerns about the use of AI to create racist images and abusers using phrases or jumbled letters to circumvent algorithms.
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"It's very much gone beyond just a text rant now, which is obviously bad enough, but now we're seeing that people are using images to create some of the most offensive things that you could imagine," Mr Cooper said.
"I think video will be something in the future going forward that could be a problem, and we have seen that with deepfakes."
Instagram owner Meta and Elon Musk's X both said they would not provide detail about any work to eradicate racism - declining months of requests for interviews.
Being on social media means children are more aware than ever of incidents of racist abuse across football.
After leading the class in west London, Premier League Primary Stars coordinator Benjamin Abrahams said: "Having to speak to young pupils about things they've heard, things they know about, can sometimes be tough.
"But actually, it's a great chance to speak to them and have those open conversations. To discuss why things are said, why things happen, but [why] it's not right, and be able to discuss what is correct and what should we all hope for."
PPE Medpro, the company founded by her husband Doug Barrowman and introduced to a "VIP lane" for providers by the Conservative peer, has until 4pm to make the payment.
While Mr Barrowman has described himself as the "ultimate beneficial owner" of PPE Medpro, and says £29m of profit from the deal was paid into a trust benefitting his family, including Baroness Mone and her children, he was never a director and the couple are not personally liable for the money.
PPE Medpro filed for insolvency the day before Mrs Justice Cockerill's finding of breach of contract was published, and the company's most recent accounts show assets of just £666,000.
Court-appointed administrators will now be responsible for recovering as much money as possible on behalf of creditors, principally the DHSC.
Last week, Mr Barrowman's spokesman said "consortium partners" of PPE Medpro are "prepared to enter into a dialogue with the administrators of the company to discuss a possible settlement with the government".
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Sky News understands the consortium met last week and has contacted the administrators to request they facilitate a negotiation with the government.
Mr Barrowman's spokesman did not specify how much they would be willing to offer by way of settlement, but in June PPE Medpro offered to settle the case for £23m.
The DHSC rejected that offer, but with the company in administration and potentially limited avenues to recover funds, there is a risk the government may recover nothing while incurring further legal expenses.
What happened during the pandemic?
In June 2020, PPE Medpro won contracts worth a total of £203m to provide 210 million masks and 25 million surgical gowns after Baroness Mone contacted ministers, including Michael Gove, on the company's behalf.
While the £81m mask contract was fulfilled, the gowns were rejected for failing sterility standards, and in 2022 the DHSC sued. Earlier this month, Mrs Justice Cockerill ruled PPE Medpro was in breach of contract and liable to repay the full amount.
Mr Barrowman has previously named several other companies as part of the gown supply, including two registered in the UK, and last week his spokesman said there was a "strong case" for the administrator to pursue them for the money.
One of the companies named has denied any connection to PPE Medpro and two others have not responded to requests for comment.
What could government do about it?
Insolvency experts say administrators and creditors, in this case the government, may have some recourse to pursue individuals and entities beyond the liable company, but any process is likely to be lengthy and expensive.
Julie Palmer, a partner at Begbies Traynor, told Sky News: "The administrators will want to look at what's happened to what look like significant profits made on these contracts.
"If I was looking at this, I would want to establish the exact timeline, at what point were the profits taken out.
"They may also want to consider whether there is a claim for wrongful trading, because that effectively pierces the corporate veil of protection of a limited company, and can allow proceedings against company officers personally.
"The net of a director can also be expanded to shadow directors, people sitting in the background quite clearly with a degree of control of the management of the company, in which case some claims may rest against them."
A spokesman for Forvis Mazars, one of the joint administrators of PPE Medpro, did not comment other than to confirm the firm's appointment.
The DHSC was approached for comment.