Ofgem Says 315 Data Centres Want Twice Britain's Power

Photo: A transmission pylon on the British grid — the network Ofgem says is being clogged by speculative data centre applications. Credit: Trevor Littlewood / Wikimedia Commons (CC BY-SA 2.0).

Britain has a simple problem with its AI ambitions: there is no plug. Tech firms have asked for 73 gigawatts of grid connections for planned AI data centres, according to energy watchdog Ofgem — run flat out, those sites would guzzle 639 terawatt-hours a year, almost double the 323 TWh the whole country consumed in 2025. And in Liverpool this week, ministers responded to the most alarming energy numbers in a generation by ordering everyone to build faster.

Welcome to the strangest collision in British politics: the government says "go", the grid says "no", and the country's biggest industrial bet of the decade is being decided by a connection queue that is two-thirds fantasy.

The queue that ate the grid

The figures, first reported by The Sun on October 3, come from Ofgem's own assessment of the connection queue. Britain's entire peak electricity demand is about 45 gigawatts. Data centres alone want 73. The queue of projects waiting for a mains connection has tripled in under a year, rising from 41 GW of contracted demand in November 2024 to 125 GW by June 2025 — and Ofgem believes a significant number of those projects will never happen.

That is the part the headline numbers hide. Developers can currently join the grid queue for what amounts to pocket money, so many apply for power they have no firm plan to use — holding land but no planning consent, no power agreement, no committed tenant. WIRED, which detailed the "phantom data centre" problem back in August, quoted Taco Engelaar, managing director at grid optimisation company Neara, who put it bluntly: "It's absolutely insane. No one really understands … what the real grid demand will be because of these phantom projects."

Ofgem has had enough. Its answer is a Data Centre Commitment Fee of between £237,500 and £712,500 per megawatt, charged when a large project accepts a connection offer — refunded only when the site reaches full energisation, and forfeited outright if the developer walks away early. For a gigawatt-scale campus, that is a nine-figure deposit. The consultation opened on July 29 and closed in mid-September; we checked the status on October 3, and it is now listed as awaiting a decision.

"While there are currently unprecedented numbers of data centres seeking grid connections, the reality is that not every project in the queue will go ahead," Ofgem said in a statement to The Sun. "That's why we're taking action to distinguish between projects with credible plans to connect and those that are unlikely to proceed, helping avoid unnecessary costs and delays across the system."

Nathan Macwhinnie, Ofgem's deputy director of strategic planning and connections, struck the same note in a statement to WIRED: "We recognize data centers are a key part of the UK's AI ambitions and future economic growth. Enabling viable data centers to connect more quickly is an enabler of this."

You don't need a decoder ring for this one. Ofgem likes data centres well enough — what it can't stand is queue-squatters. Alex Burgoyne, head of data centres at real estate consultancy Knight Frank, told WIRED the buildout "is bringing a huge amount of capital investment into the UK" — then, on the crackdown: "We don't want to shoot the golden goose."

Liverpool says build. The grid says wait.

Timing is everything, and the timing here is exquisite. The Ofgem numbers landed just as the Labour Party gathered in Liverpool for its annual conference — the first under Andy Burnham, who became prime minister in July after Keir Starmer's resignation, and who used his keynote speech on September 29 to unveil plans for a publicly owned Great British Grid alongside promises of greater public control of essential utilities.

The message from the conference floor was unambiguous. AI minister Kanishka Narayan told delegates Britain must "move faster" on data centres, and Burnham himself rejected calls for a halt to new sites — the Greens' leader Zack Polanski called for a pause back in August, and the government shot it down. "A pause on building new data centres would simply send investment and good jobs abroad," a government spokesperson said at the time. "It would be a disaster for jobs and national security."

There is a whiff of two governments talking past each other here. DSIT is designating AI Growth Zones and promising at least 6 gigawatts of AI-capable data centre capacity by 2030, while Ofgem is trying to fine developers hundreds of thousands of pounds per megawatt just for joining the queue. Both wings of the state agree the AI future is coming. They disagree, rather fundamentally, on whether Britain's wires can take it.

To be fair to the ministers, "move faster" is not irrational. The European supercomputer build-out is accelerating, sovereign compute is now treated as national infrastructure, and Britain's AI Safety Institute has been racing to keep its own testing capacity credible. Nobody in Whitehall wants to be the person who told the world's AI labs to go elsewhere. But optimism is not a grid strategy, and Ofgem's 73-gigawatt number is the closest thing Britain has to one.

A gigawatt of symbolism in Scotland

Nowhere is the tension sharper than in Dumfries and Galloway, where a planning application has just been lodged for what developers say would be the world's biggest data centre. Take the £16.5 billion CX Technology Campus at Chapelcross — the site of Scotland's first commercial nuclear power station, silent since 2004. If approved, it would squeeze eight data centres and a training centre into 162,000 square metres and drink roughly a gigawatt. That's the electricity of 2.5 million homes, riding on a single planning application.

The developer, naturally, sees it differently. Graeme Anderson, chief executive of applicant CX Tech, called the scheme "a once-in-a-generation opportunity for Dumfries and Galloway and for Scotland." His pitch to the BBC: "Chapelcross has the potential to bring together our renewable energy strengths, digital infrastructure and high-value jobs in a way that few other sites can."

The other side isn't buying it. The Scottish Greens want councillors to bin the application, and their numbers are stark: roughly seven million megawatt-hours of electricity a year, they claim — north of two million homes' worth. South Scotland MSP Laura Moodie didn't mince words: "This is one of the most seriously concerning data centre applications to date. The proposed site alone would use an unsustainably high amount of energy. While household energy bills keep going up, hyperscale data centres will only make that worse."

About 1,000 locals have signed a petition against the scheme, warning it could strain the grid and send household bills "rocketing" — while the planning statement promises up to 750 construction jobs and around 540 once operational, on a campus designed, the developers insist, to run net zero. Eight years to build, 40-metre-tall server halls, cooling towers long demolished now replaced by something taller: Chapelcross is a near-perfect metaphor. Where the nuclear reactors once made electricity, Britain now proposes to spend it.

Photo: A Microsoft data centre under construction in Staffanstorp, Sweden — the kind of hyperscale campus Britain wants on its own soil, if it can find the electricity. Credit: Johan Wessman / News Øresund via Wikimedia Commons (CC BY 2.0).

The jobs don't add up, and the houses can't wait

The most damaging numbers in this whole debate don't come from Ofgem at all. They come from think tank Verdant, whose September analysis shredded the industry's employment pitch: UK data centres support roughly 8.6 jobs per megawatt, versus the 47.3 per MW claimed by trade body techUK. Steelworks manage 291 jobs per megawatt. Car plants: 400.

Those figures reframe everything. Britain is being asked to reserve a double-national-grid's worth of electricity for an industry that, by one credible estimate, employs a quarter of the people it says it does — while the queue has real-world casualties. Data centres already accounted for 65% of all grid electricity consumed in Slough in 2024. The London Assembly found last December that housing developments in Ealing, Hillingdon and Hounslow were being offered grid connections as late as 2037. Homes wait eleven years; server farms jump the line. That is not an engineering constraint. That is a choice.

Then there is water. Water UK says data centres in England are set to consume 19.8 million litres a day by 2030 — at the same moment Britain's reservoirs are under their worst stress in living memory and the government is pleading with households to mind the hosepipe. Nobody voted to ration their showers so a chatbot could run faster, and the Greens are not going to let anyone forget it.

This is the debate the broader AI-jobs reckoning has been waiting for: who actually gains from the AI buildout, and who pays the utility bill? The answer in Britain, right now, looks colossally lopsided.

Ofgem's data centre warning: the questions everyone asks

How many data centres want UK grid connections?
315, asking for 73 gigawatts — against Britain's ~45GW peak demand and 323TWh of 2025 consumption (Ofgem figures, first reported by The Sun on Oct 3).

What is the Data Centre Commitment Fee?
£237,500–£712,500 per megawatt, charged when a large project accepts a connection offer; refunded only at full energisation, forfeited if the developer walks away (Ofgem consultation, opened July 29).

Why is Ofgem doing this?
Queue-squatting: joining the grid queue costs almost nothing, so speculative "phantom" projects clog it (WIRED, Aug 2026); Ofgem wants to separate credible projects from unlikely ones.

What's the consultation status?
Closed in mid-September; awaiting a decision as of Oct 3.

Our take: fine the fantasists, then build the wires

Here is the uncomfortable truth both sides are dancing around. Ofgem's fee is good policy — long overdue, in fact. A queue that costs nothing to join will fill with ghosts, and every ghost delays a real project while grid planners chase mirages. Charging hundreds of thousands of pounds per megawatt for a connection offer will flush the speculators out fast, and the industry's howling about it only proves the fee is set about right. It should be adopted, quickly, and the forfeiture rules kept sharp.

But a fee is not a strategy. It clears the queue; it does not add a single volt of capacity. The government's AI Growth Zones promise 6 GW of AI-capable capacity by 2030 against a queue that is already asking for more than ten times that, and Burnham's publicly owned Great British Grid is — for now — a conference applause line, not a build plan with a date. Meanwhile transformer factories have two-to-three-year backlogs, local substations have no physical room, and Keith Bell, professor of electronic and electrical engineering at the University of Strathclyde, has been patiently explaining for months that one facility's connection cascades onto higher-voltage lines miles away. You cannot keynote-speech your way around physics.

Britain wants to be an AI superpower on a grid designed for kettles and streetlights. That gap is the whole story. Ofgem is doing the regulator's job; the government now has to do the builder's job — or admit, as nobody in Liverpool quite would, that some of these data centres are never coming at all.

Sources: The Sun (Oct 3, 2026); hotminute.co.uk / Verdant briefing (Sept 10, 2026); dig.watch (Sept 17, 2026); Energy Voice; TFTC; The Stack; FutureScot; High Growth Scotland / BBC News; Classic FM (Oct 1, 2026); The Scottish Sun; WIRED reporting on the UK grid's "phantom data centre" problem (Aug 2026).

By Daniel Rao, TechPulse USA
Daniel Rao covers AI, labor economics and US technology policy for TechPulse USA.