UK Megafarm Applications Routinely Skip Climate Data, Letting Emissions Slip Past Councils

If you live near a river that smells different than it used to, or you've noticed new sheds going up on the edge of your village, you may already sense something the paperwork won't tell you: industrial-scale livestock farming carries a carbon cost that rarely makes it into the planning file. That's not an accident. It's a pattern.

A new review has found that applications for large pig and poultry farms across the UK's biggest farming counties have routinely failed to disclose their climate impacts, even after a Supreme Court ruling meant to close exactly that loophole.

In June 2024, the Finch ruling on a Surrey oil well confirmed that developers must account for all significant direct and indirect greenhouse gas emissions when seeking planning permission. Campaigners called it a "beginning of the end" for factory farming's free pass on climate scrutiny. Think of it as requiring a restaurant to list calories on the menu, not just the ingredients it likes to highlight.

But a review of 35 proposed developments by the advocacy group Sustain, analysed by DeSmog and The Guardian, tells a different story. Spanning Herefordshire, Lincolnshire, Norfolk, Suffolk, Nottinghamshire, Shropshire, Yorkshire, Wales and Northern Ireland, the applications were submitted between the ruling and this September. None of them included figures on the farms' likely emissions. Not one.

Under UK law, any farm housing more than 900 sows, 3,000 pigs, 60,000 egg-laying hens, or 85,000 meat chickens must detail its expected environmental impacts before breaking ground. If all 35 applications win approval, that would mean 30,000 more pigs and nearly five million more chickens raised across England, Northern Ireland and Wales, pushing the total toward 37 million additional animals farmed in the UK each year.

That scale matters because intensive pig and poultry operations are heavy emitters of methane and nitrous oxide. These gases don't get the same headlines as carbon dioxide, but they're far more potent: methane traps roughly 30 times more heat than CO2 over a century, and nitrous oxide around 300 times more. Sustain estimates that if every application reviewed goes ahead, the result would be 634,000 tonnes of CO2-equivalent emissions a year, comparable to 488,000 return flights between London and New York.

A Pattern of Omission

The applications weren't all from small operators. Some came from subsidiaries of major meat producers, including Crown Chicken, part of Cranswick, one of Europe's largest meat companies, which slaughters nearly 60 million birds annually and emitted three million tonnes of CO2 in 2024. When DeSmog asked Cranswick about the missing climate data in its applications, the company declined to comment.

Of the 35 applications, 35 percent mentioned climate impacts only in passing, and 55 percent didn't discuss them at all. Many did address smells and air pollutants in detail, showing that thorough environmental assessment is possible when companies choose to provide it. Climate data was simply left out.

"Vital information is being kept from councils and the public," Ruth Westcott, campaign manager at Sustain, told DeSmog. "It's clear that agribusinesses don't want to come clean about the pollution they cause because it could affect whether they are allowed to expand, and thus make more profits at the expense of our communities. It's an emissions scandal."

There are signs the system is starting to push back. In April, King's Lynn & West Norfolk Borough Council refused planning permission for the Methwold megafarm, which would have housed almost 900,000 chickens and pigs, citing its lack of climate assessment among the reasons. It's the first known refusal on those grounds. Breckland Council in Norfolk followed suit in October, rejecting Cherry Tree Farm, a Cranswick subsidiary site, partly because it hadn't updated its environmental impact assessment to include project-specific carbon emissions. Residents there had already endured years of complaints about the "stench" from a 2019 expansion.

Four applications have been refused so far, three of them from Cranswick. But that leaves far more that sailed through. Councils in Norfolk, Nottinghamshire, Suffolk, Lincolnshire and Yorkshire have approved six farms in the past year with no climate data at all, and a seventh with only passing mention. West Lindsey Council in Lincolnshire, the fastest-growing county for intensive livestock farming, approved an expansion at Happylands Farm that will raise pig numbers by 1,300 to nearly 4,000, again without any emissions information in the application. If every application in Lincolnshire alone is approved, the county would see an extra 6,500 pigs and almost 13 million chickens raised there each year.

Some applications that did mention climate impacts downplayed them. More than a dozen reviewed by Sustain included near-identical statements from the planning consultancy Harrison Pick, noting that "current poultry production in the UK is responsible for a fraction of the greenhouse gas emissions associated with red meat production." That's true as far as it goes, cattle farming remains the UK's top agricultural emitter, but it sidesteps the comparison that matters here: a serving of chicken still carries roughly ten times the carbon footprint of tofu or beans. Harrison Pick told DeSmog it has "consistently complied with the scope and requirements set by local planning authorities" and that applying the Finch ruling to livestock remains an "evolving area" of law.

Environmental lawyer Ricardo Gama of Leigh Day said that gap could become a legal liability. "Where the companies are not assessing their climate impacts, they may be open to legal challenge," he said. "Agriculture has flown under the radar on so many of these issues, but I think that is changing."

Why It Matters

Planning decisions shape the air residents breathe and the climate commitments the country claims to be chasing. Government policy says local planning should support the UK's 2050 net-zero target, yet without emissions data, councils are approving developments without being able to weigh that harm at all.

Jan Palmer, who campaigned against the Methwold megafarm, put it plainly: "These are industrial developments. It's called industrial farming, and it has industrial emissions." She warned that without organised public pressure, applications like hers "would've slipped through the system like so many others do, quietly and without scrutiny but with devastating consequences."

Kevin Bunn, campaigning against a proposed poultry farm in Whaplode Drove that drew more than 1,800 objections, echoed that frustration. Companies, he said, have grown "so used to them flying through under the radar without any proper scrutiny." The pushback from residents in Norfolk and Lincolnshire suggests that era may be ending, one planning meeting at a time. Whether councils, courts, or Parliament close the gap first remains to be seen, but the emissions data isn't going to disclose itself.