The NDA said the “leak in the Magnox Swarf Storage Silo is contained and does not pose a risk to the public”
The UK’s largest nuclear site could continue leaking radioactive water until the 2050s, MPs have warned, while its clean-up operations struggle to progress quickly enough.
The Public Accounts Committee (PAC) criticised the speed of decommissioning work at Sellafield in Cumbria, citing “cost overruns and continuing safety concerns” in a report published on Wednesday.
Although the committee noted there were “signs of improvement”, PAC chairman Sir Geoffrey Clifton-Brown said Sellafield continued to present “intolerable risks”.
The Nuclear Decommissioning Authority (NDA) acknowledged the leak at its Magnox Swarf Storage Silo (MSSS) was its “single biggest environmental issue”.
The MSSS, which the NDA described as “the most hazardous building in the UK”, has been leaking radioactive water into the ground since 2018, releasing enough to fill an Olympic swimming pool every three years.
It is likely to continue leaking until the oldest section of the building has been emptied in the 2050s, about a decade later than previously expected.
Sir Geoffrey said: “As with the fight against climate change, the sheer scale of the hundred-year timeframe of the decommissioning project makes it hard to grasp the immediacy of safety hazards and cost overruns that delays can have.
“Every day at Sellafield is a race against time to complete works before buildings reach the end of their life.
“Our report contains too many signs that this is a race that Sellafield risks losing.”
UK newspapers have already launched more editorials attacking Ed Miliband in the first four months of 2025 than they did during the whole of 2024, Carbon Brief analysis reveals.
In the year to date, predominantly right-leaning publications have published 65 editorials – articles seen as the newspaper’s formal “voice” – criticising the UK energy secretary, compared with only 61 across the full year of 2024.
Nearly four sucheditorials have been published every week so far in 2025, roughly three times the rate of the previous year.
This is a significant escalation from a period that had already seen an unprecedented torrent of attacks levelled at the energy secretary.
The articles, which primarily appear in the Sun, the Daily Mail and the Daily Telegraph, frequently seek to label Miliband as a “net-zero zealot” with a “messianic” devotion to climate action.
They have also tried to blame him for the potential closure of the UK’s remaining steel plant and – most recently – misrepresented the words of former prime minister Sir Tony Blair to falsely present them as a personal rebuke to Miliband.
Many of the articles urge prime minister Keir Starmer to “sack” Miliband due to his supposedly “radical” policy ideas, referring to him as a “liability” for the Labour government.
Despite this near-obsessive stream of criticism and constantspeculation about the energy secretary’s job security, the prime minister has said unequivocally that the net-zero agenda is “in my government’s DNA” and that Miliband is “doing a great job”.
Record criticism
The UK’s Labour government won an election last summer, with a large majority, on the back of a manifesto that focused heavily on climate action.
As laid out at the time, one of the government’s “five missions” was to:
“Make Britain a clean-energy superpower to cut bills, create jobs and deliver security with cheaper, zero-carbon electricity by 2030.”
Miliband, the energy security and net-zero secretary, is the minister overseeing this brief and the public face of much of the government’s net-zero strategy.
This position has resulted in a relentless stream of criticism and personal attacks from right-leaning commentators and media organisations, against a backdrop of rising political and press opposition to net-zero.
Carbon Brief analysis in January revealed the scale of the personal attacks levelled at Miliband in newspaper editorials during 2024, both in the lead up to the general election and in the months that followed.
However, the new analysis shows that the 61 critical editorials published last year have already been eclipsed in 2025 after barely four months of intense focus on Miliband.
As of 2 May, predominantly right-leaning newspapers have already published 65 editorials taking aim at the energy secretary this year. The chart below, which shows the cumulative number of such editorials, highlights this rapid escalation.
Cumulative number of UK newspaper editorials criticising energy secretary Ed Miliband in 2024 (blue) and 2025 so far (red). Source: Carbon Brief analysis.
Specific events, often only vaguely related to the energy secretary, have inflated the criticism of Miliband in the media.
One example was the imminent closure of the UK’s last remaining steel blast furnaces in Scunthorpe, in early April. Right-leaning newspapers blamed Miliband, among other things, for “banning new coal mines” in the UK, which they argued could have provided coking coal to the facility.
(The Scunthorpe site’s owners prior to government control, British Steel, had said that the coal from a planned mine in Cumbria would not have been suitable for their needs.)
More recently, right-leaning newspapers have used the furore around a report published by the Tony Blair Institute for Global Change (TBI) as a further opportunity to criticise Miliband.
Many publications misleadingly interpreted comments by Blair as a criticism of the Starmer government’s net-zero policies and, by association, Miliband himself. They described the energy secretary as an “eco-loon” compared to the “uncontroversial” advice from Blair.
Miliband the ‘fanatic’
The majority of the criticism of Miliband in newspaper editorials in 2025 has come from the Daily Mail, the Sun and the Daily Telegraph.
The Sun remains the most consistent critic of Miliband, with 26 editorials published in 2025 so far. There have only been 18 weeks in 2025 to date. As the chart below shows, this spate of 26 editorials from the Sun is already approaching last year’s record of 29.
UK newspaper editorials criticising Ed Miliband, broken down by publication, in 2024 and 2025. Source: Carbon Brief analysis.
The attacks levelled at Miliband by right-leaning newspapers are often both highly personal and somewhat melodramatic.
They frequently imply that his focus on net-zero policies is a sign of mental instability or quasi-religious devotion, rather than being part of his job title – or acknowledging that reaching net-zero emissions is the only way scientists say climate change can be prevented from getting worse.
The Sun has referred to Miliband’s “uncontrolled fanaticism”. The Sun on Sunday has described the “madness of Ed Miliband’s green crusade” and called him the “fanatical prophet of net-zero”.
Another editorial from the Sun stated that “Miliband is so blinded by eco-ideology that he’s lost touch with reality”, referring to his “eco insanity”.
In an editorial lamenting the state of the UK’s oil-and-gas industry, which shed 10s of 1,000s of jobs under the previous Conservative government, the Daily Mail mentioned:
“Energy secretary Ed Miliband’s messianic desire to sacrifice a multi-billion pound industry on the altar of net-zero.”
The newspapers also suggest that Miliband is unwilling to listen to any criticism. “Miliband has shown himself unprepared to countenance any suggestion that his efforts to decarbonise the grid within five years might be reckless,” the Daily Telegraph claimed.
There have also been frequent calls from newspaper editorials for Starmer to sack the energy secretary. In an article titled “Miliband’s madness”, published at the end of April, the Daily Mail asked:
“Isn’t it time Sir Keir Starmer accepted his colleague’s ideological net-zero fervour is damaging the government – and sacked him?”
Beyond the editorial pages, there has also been a constant stream of comment pieces, many by climate sceptics, which often go even further in their attacks on the energy secretary. “Miliband belongs in a padded cell,” Daily Mail columnist Richard Littlejohn wrote at the start of May.
This has come amid much media speculation from commentators on both the left and right that Starmer is considering firing Miliband.
However, Starmer has not given any indication of doing this.
On the contrary, at the recent energy security conference the UK government hosted in London, Starmer stated that he was fully committed to his government’s net-zero ambitions. “That is in the DNA of my government,” he stated in a widely covered speech.
dizzy: Miliband has been vilified by the same right-wing climate science deniers in a similar way to Just Stop Oil and others labelled zealots. I object to his and thereby the current Labour government’s policy of supporting Carbon Capture and Nuclear for different reasons. Both are false solutions needing huge government subsidies, carbon capture and storage is an unproved, false solution proposed by the fossil fuel industry to enable them to continue destroying the planet, nuclear supports producing nuclear weapons and [ed: is] hugely capital intensive producing radioactive waste that needs to be managed for thousands to millions of years. A far better response is rapid decarbonisation including conversion to renewables and to travel far less, prevent the rich from causing so much damage.
SELF-DECEPTION: A 245-tonne steel dome is lifted onto Hinkley Point C’s first reactor building, at Bridgwater, Somerset on December 15 2023 – note the slogan on the banner
The government’s nuclear power expansion plan is a hollow betrayal of working people that panders to wealthy corporations and will rip off consumers, writes LINDA PENTZ GUNTER
…
The restriction on building new reactors on existing nuclear sites is to be lifted so they could be built anywhere and everywhere and people who “hadn’t thought there’s going to be anything nuclear near me” will simply “get used to the idea of it,” Starmer said.
…
The whole thing is of course a massive con that would, if such a plan ever materialised, dramatically raise electricity rates, further fleece taxpayers, impede real progress on climate by diverting money away from already available renewable energy solutions, and put countless communities in danger.
And of course, what will become of the radioactive waste these “small” reactors would still produce? A recent Stanford study found that small modular reactors will actually generate more radioactive waste than conventional nuclear power plants.
Unions should not be fooled. Promising jobs that will likely never materialise and would be better created immediately in industries such as renewable energy that are here now and have a long-term future, isn’t a boon to working people, it’s yet another betrayal.
Further, nuclear power, as the industry has itself demonstrated over and over, is the slowest and most expensive energy choice among the so-called low-carbon options.
No nuclear reactor, small or otherwise, will ever be built in time, affordably or in enough quantities to address the climate crisis that is already upon us.
This article was originally posted 6/12/24 but was deleted probably by mistake.
Mark Zuckerberg, CEO of Meta, testifies before a U.S. Senate Judiciary Committee hearing on January 31, 2024, in Washington, D.C. (Photo: Celal Gunes/Anadolu via Getty Images)
“In the blind sprint to win on AI, Meta and the other tech giants have lost their way,” said a leader at Environment America.
Environmental advocates this week responded with concern to Meta looking for nuclear power developers to help the tech giant add 1-4 gigawatts of generation capacity in the United States starting in the early 2030s.
Meta—the parent company of Instagram, Facebook, WhatsApp, and more—released a request for proposals to identify developers, citing its artificial intelligence (AI) innovation and sustainability objectives. It is “seeking developers with strong community engagement, development, …permitting, and execution expertise that have development opportunities for new nuclear energy resources—either small modular reactors (SMR) or larger nuclear reactors.”
The company isn’t alone. As TechCrunch reported: “Microsoft is hoping to restart a reactor at Three Mile Island by 2028. Google is betting that SMR technology can help it deliver on its AI and sustainability goals, signing a deal with startup Kairos Power for 500 megawatts of electricity. Amazon has thrown its weight behind SMR startup X-Energy, investing in the company and inking two development agreements for around 300 megawatts of generating capacity.”
In response to Meta’s announcement, Johanna Neumann, Environment America Research & Policy Center’s senior director of the Campaign for 100% Renewable Energy, said: “The long history of overhyped nuclear promises reveals that nuclear energy is expensive and slow to build all while still being inherently dangerous. America already has 90,000 metric tons of nuclear waste that we don’t have a storage solution for.”
“Do we really want to create more radioactive waste to power the often dubious and questionable uses of AI?” Neumann asked. “In the blind sprint to win on AI, Meta and the other tech giants have lost their way. Big Tech should recommit to solutions that not only work but pose less risk to our environment and health.”
“Data centers should be as energy and water efficient as possible and powered solely with new renewable energy,” she added. “Without those guardrails, the tech industry’s insatiable thirst for energy risks derailing America’s efforts to get off polluting forms of power, including nuclear.”
In a May study, the Electric Power Research Institute found that “data centers could consume up to 9% of U.S. electricity generation by 2030—more than double the amount currently used.” The group noted that “AI queries require approximately 10 times the electricity of traditional internet searches and the generation of original music, photos, and videos requires much more.”
Meta is aiming to get the process started quickly: The intake form is due by January 3 and initial proposals are due February 7. It comes after a rare bee species thwarted Meta’s plans to build a data center powered by an existing nuclear plant.
Following the nuclear announcement, Meta and renewable energy firm Invenergy on Thursday announced a deal for 760 megawatts of solar power capacity. Operations for that four-state project are expected to begin no later than 2027.
Sellafield has ‘retrieved much less waste than it had planned’ since 2020, the NAO said. Photograph: David Levene/The Guardian
National Audit Office questions value for money as predicted bill for decommissioning increases by £21bn
The cost of cleaning up Sellafield is expected to spiral to £136bn and Europe’s biggest nuclear waste dump cannot show how it offers taxpayers value for money, the public spending watchdog has said.
Projects to fix buildings containing hazardous and radioactive material at the state-owned site on the Cumbrian coast are running years late and over budget. Sellafield’s spending is so vast – with costs of more than £2.7bn a year – that it is causing tension with the Treasury, the report from the National Audit Office (NAO) suggests.
Officials from finance ministry told the NAO it was “not always clear” how Sellafield made decisions, the report reveals. Criticisms of its costs and processes come as the chancellor, Rachel Reeves, prepares to plug a hole of about £40bn in her maiden budget.
Europe’s most hazardous industrial site has previously been described by a former UK secretary of state as a “bottomless pit of hell, money and despair”. The Guardian’s Nuclear Leaks investigation in late 2023 revealed a string of cybersecurity problems at the site, as well as issues with its safety and workplace culture.
The NAO found that Sellafield was making slower-than-hoped progress on making the site safe and that three of its most hazardous storage sites pose an “intolerable risk”.
The site is a sprawling collection of buildings, many never designed to hold nuclear waste long-term, now in various states of disrepair. It stores and treats decades of nuclear waste from atomic power generation and weapons programmes, has taken waste from countries including Italy and Sweden, and is the world’s largest store of plutonium.
