If you ever fly to Washington DC, look out of the window as you land at Dulles Airport – and you might snatch a glimpse of the single biggest story in economics right now.
There below you, you will see scattered around the fields and woods of the local area a set of vast warehouses that might to the untrained eye look like supermarkets or distribution centres. But no: these are in fact data centres – the biggest concentration of data centres anywhere in the world.
For this area surrounding Dulles Airport has more of these buildings, housing computer servers that do the calculations to train and run artificial intelligence (AI), than anywhere else. And since AI accounts for the vast majority of economic growth in the US so far this year, that makes this place an enormous deal.
Down at ground level you can see the hallmarks as you drive around what is known as “data centre alley”. There are enormous power lines everywhere – a reminder that running these plants is an incredibly energy-intensive task.
This tiny area alone, Loudoun County, consumes roughly 4.9 gigawatts of power – more than the entire consumption of Denmark. That number has already tripled in the past six years, and is due to be catapulted ever higher in the coming years.
Inside ‘data centre alley’
We know as much because we have gained rare access into the heart of “data centre alley”, into two sites run by Digital Realty, one of the biggest datacentre companies in the world. It runs servers that power nearly all the major AI and cloud services in the world. If you send a request to one of those models or search engines there’s a good chance you’ve unknowingly used their machines yourself.
Image: Inside a site run by Digital Realty
Their Digital Dulles site, under construction right now, is due to consume up to a gigawatt in power all told, with six substations to help provide that power. Indeed, it consumes about the same amount of power as a large nuclear power plant.
Walking through the site, a series of large warehouses, some already equipped with rows and rows of backup generators, there to ensure the silicon chips whirring away inside never lose power, is a striking experience – a reminder of the physical underpinnings of the AI age. For all that this technology feels weightless, it has enormous physical demands. It entails the construction of these massive concrete buildings, each of which needs enormous amounts of power and water to keep the servers cool.
We were given access inside one of the company’s existing server centres – behind multiple security cordons into rooms only accessible with fingerprint identification. And there we saw the infrastructure necessary to keep those AI chips running. We saw an Nvidia DGX H100 running away, in a server rack capable of sucking in more power than a small village. We saw the cooling pipes running in and out of the building, as well as the ones which feed coolant into the GPUs (graphic processing units) themselves.
Such things underline that to the extent that AI has brainpower, it is provided not out of thin air, but via very physical amenities and infrastructure. And the availability of that infrastructure is one of the main limiting factors for this economic boom in the coming years.
According to economist Jason Furman, once you subtract AI and related technologies, the US economy barely grew at all in the first half of this year. So much is riding on this. But there are some who question whether the US is going to be able to construct power plants quickly enough to fuel this boom.
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2:08
Is Trump’s AI plan a ‘tech bro’ manifesto?
For years, American power consumption remained more or less flat. That has changed rapidly in the past couple of years. Now, AI companies have made grand promises about future computing power, but that depends on being able to plug those chips into the grid.
Last week the International Monetary Fund’s chief economist, Pierre-Olivier Gourinchas, warned AI could indeed be a financial bubble.
He said: “There are echoes in the current tech investment surge of the dot-com boom of the late 1990s. It was the internet then… it is AI now. We’re seeing surging valuations, booming investment and strong consumption on the back of solid capital gains. The risk is that with stronger investment and consumption, a tighter monetary policy will be needed to contain price pressures. This is what happened in the late 1990s.”
‘The terrifying thing is…’
For those inside the AI world, this also feels like uncharted territory.
Helen Toner, executive director of Georgetown’s Center for Security and Emerging Technology, and formerly on the OpenAI board, said: “The terrifying thing is: no one knows how much further AI is going to go, and no one really knows how much economic growth is going to come out of it.
“The trends have certainly been that the AI systems we are developing get more and more sophisticated over time, and I don’t see signs of that stopping. I think they’ll keep getting more advanced. But the question of how much productivity growth will that create? How will that compare to the absolutely gobsmacking investments that are being made today?”
Whether it’s a new industrial revolution or a bubble – or both – there’s no denying AI is a massive economic story with massive implications.
For energy. For materials. For jobs. We just don’t know how massive yet.
Did the chancellor mislead the public, and her own cabinet, before the budget?
It’s a good question, and we’ll come to it in a second, but let’s begin with an even bigger one: is the prime minister continuing to mislead the public over the budget?
The details are a bit complex but ultimately this all comes back to a rather simple question: why did the government raise taxes in last week’s budget? To judge from the prime minister’s responses at a news conference just this morning, you might have judged that the answer is: “because we had to”.
“There was an OBR productivity review,” he explained to one journalist. “The result of that was there was £16bn less than we might otherwise have had. That’s a difficult starting point for any budget.”
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3:29
Beth Rigby asks Keir Starmer if he misled the public
Time and time again throughout the news conference, he repeated the same point: the Office for Budget Responsibility had revised its forecasts for the UK economy and the upshot of that was that the government had a £16bn hole in its accounts. Keep that figure in your head for a bit, because it’s not without significance.
But for the time being, let’s take a step back and recall that budgets are mostly about the difference between two numbers: revenues and expenditure; tax and spending. This government has set itself a fiscal rule – that it needs, within a few years, to ensure that, after netting out investment, the tax bar needs to be higher than the spending bar.
At the time of the last budget, taxes were indeed higher than current spending, once the economic cycle is taken account of or, to put it in economists’ language, there was a surplus in the cyclically adjusted current budget. The chancellor had met her fiscal rule, by £9.9bn.
Image: Pic: Reuters
This, it’s worth saying, is not a very large margin by which to meet your fiscal rule. A typical budget can see revisions and changes that would swamp that in one fell swoop. And part of the explanation for why there has been so much speculation about tax rises over the summer is that the chancellor left herself so little “headroom” against the rule. And since everyone could see debt interest costs were going up, it seemed quite plausible that the government would have to raise taxes.
Then, over the summer, the OBR, whose job it is to make the official government forecasts, and to mark its fiscal homework, told the government it was also doing something else: reviewing the state of Britain’s productivity. This set alarm bells ringing in Downing Street – and understandably. The weaker productivity growth is, the less income we’re all earning, and the less income we’re earning, the less tax revenues there are going into the exchequer.
The early signs were that the productivity review would knock tens of billions of pounds off the chancellor’s “headroom” – that it could, in one fell swoop, wipe off that £9.9bn and send it into the red.
That is why stories began to brew through the summer that the chancellor was considering raising taxes. The Treasury was preparing itself for some grisly news. But here’s the interesting thing: when the bad news (that productivity review) did eventually arrive, it was far less grisly than expected.
True: the one-off productivity “hit” to the public finances was £16bn. But – and this is crucial – that was offset by a lot of other, much better news (at least from the exchequer’s perspective). Higher wage inflation meant higher expected tax revenues, not to mention a host of other impacts. All told, when everything was totted up, the hit to the public finances wasn’t £16bn but somewhere between £5bn and £6bn.
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8:46
Budget winners and losers
Why is that number significant? Because it’s short of the chancellor’s existing £9.9bn headroom. Or, to put it another way, the OBR’s forecasting exercise was not enough to force her to raise taxes.
The decision to raise taxes, in other words, came down to something else. It came down to the fact that the government U-turned on a number of its welfare reforms over the summer. It came down to the fact that they wanted to axe the two-child benefits cap. And, on top of this, it came down to the fact that they wanted to raise their “headroom” against the fiscal rules from £9.9bn to over £20bn.
These are all perfectly logical reasons to raise tax – though some will disagree on their wisdom. But here’s the key thing: they are the chancellor and prime minister’s decisions. They are not knee-jerk responses to someone else’s bad news.
Yet when the prime minister explained his budget decisions, he focused mostly on that OBR report. In fact, worse, he selectively quoted the £16bn number from the productivity review without acknowledging that it was only one part of the story. That seems pretty misleading to me.
Sir Keir Starmer has denied he and the chancellor misled the public and the cabinet over the state of the UK’s public finances ahead of the budget.
The prime minister told Sky News’ political editor Beth Rigby “there was no misleading”, following claims he and Rachel Reeves deliberately said public finances were in a dire state, when they were not.
He said a productivity review by the Office for Budget Responsibility (OBR), which provides fiscal forecasts to the government, meant there would be £16bn less available so the government had to take that into account.
“To suggest that a government that is saying that’s not a good starting point is misleading is wrong, in my view,” Sir Keir said.
Cabinet ministers have said they felt misled by the chancellor and prime minister, who warned public finances were in a worse state than they thought, so they would have to raise taxes, including income tax, which they had promised not to in the manifesto.
At last Wednesday’s budget, Ms Reeves unveiled a record-breaking £26bn in tax rises.
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The OBR published the forecasts it provided to the chancellor in the two months before the budget, which showed there was a £4.2bn headroom on 31 October – ahead of that warning about possible income tax rises on 4 November.
Image: The OBR’s timings and outcomes of the fiscal forecasts reported to the Treasury
Sir Keir added: “There was a point at which we did think we would have to breach the manifesto in order to achieve what we wanted to achieve.
“Late on, it became possible to do it without the manifesto breach. And that’s why we came to the decisions that we did.”
Sir Keir said a productivity review had not taken place in 15 years and questioned why it was not done at the end of the last government, as he blamed the Conservatives for the OBR downgrading medium-term productivity growth by 0.3 percentage points to 1% at the end of the five-year forecast.
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0:58
Reeves: I didn’t lie about ‘tax hikes’
The prime minister added: “I wanted to more than double the headroom, and to bear down on the cost of living, because I know that for families and communities across the country, that is the single most important issue, I wanted to achieve all those things.
“Starting that exercise with £16 billion less than we might otherwise have had. Of course, there are other figures in this, but there’s no pretending that that’s a good starting point for a government.”
On Sunday, when asked by Sky’s Trevor Phillips if she lied, Ms Reeves said: “Of course I didn’t.”
She also said the OBR’s downgrade of productivity meant the forecast for tax receipts was £16bn lower than expected, so she needed to increase taxes to create fiscal headroom.
Virgin Media has been fined £23.8m after it disconnected vulnerable customers during a phone line migration.
Regulator, Ofcom, ruled the telecoms company had placed thousands of people “at direct risk of harm”.
The watchdog said users of Telecare – an emergency alarm and monitoring service – were disconnected if they failed to engage with a process, in late 2023, which switched old analogue lines to a digital alternative.
Ofcom said that Virgin Media had disclosed its own failures under consumer protection rules and its full cooperation was taken into account when determining the size of the penalty.
Ian Strawhorne, Ofcom’s director of enforcement, said: “It’s unacceptable that vulnerable customers were put at direct risk of harm and left without appropriate support by Virgin Media, during what should have been a safe and straightforward upgrade to their landline services.
“Today’s fine makes clear to companies that, if they fail to protect their vulnerable customers, they can expect to face similar enforcement action.”
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Ofcom found that Virgin Media failed properly to identify and record the status of telecare customers, resulting in significant gaps in the screening process.
“This meant that those affected did not receive the appropriate level of tailored support through the migration process”, it said.
It also criticised Virgin Media’s approach to disconnecting Telecare customers who did not engage in the migration process, “despite being aware of the risks posed”.
The watchdog said it had put thousands of vulnerable customers “at a direct risk of harm and prevented their devices from connecting to alarm monitoring centres while the disconnection was in place”.
The money from the fine goes to the Treasury.
A Virgin Media spokesperson said: “As traditional analogue landlines become less reliable and difficult to maintain, it’s essential we move our customers to digital services.
“While historically the majority of migrations were completed without issue, we recognise that we didn’t get everything right and have since addressed the migration issues identified by Ofcom.
“Our customers’ safety is always our top priority and, following an end-to-end review which began in 2023, we have already introduced a comprehensive package of improvements and enhanced support for vulnerable customers including improved communications, additional in-home support and extensive post-migration checks, as well as working with the industry and Government on a joint national awareness campaign.
“We’ve been working closely with Ofcom, telecare providers and local authorities to identify customers requiring additional support and are confident that the processes, policies and procedures we now have in place allow us to safely move customers to digital landlines.”