Britain's First Megafire: A Thousand Years of Carbon Gone in Four Days

It took four days for Dava Moor to release carbon that had been locked in peat for a millennium. Four days to undo what a thousand years of slow, patient, cold and wet British weather had built up beneath the heather. Four days to torch an area of land almost equal to what the United Kingdom typically loses to wildfire in an entire year.

Scientists at Stanford University have now confirmed what those who work the uplands already knew: the June 2025 blaze that tore across the Highlands and Moray was the first megafire ever recorded on British soil. Published this week in Nature Geoscience, the research applies a term until now reserved for the conflagrations of California, Australia and the Mediterranean. It belongs to us now too.

The numbers are sobering. Together with the Carrbridge fire that preceded it, Dava burned through 29,225 acres — an area thirty times the size of Strathclyde Park. The carbon released amounted to 85 per cent of the UK's average annual fire emissions from the entire two decades between 2001 and 2021. One fire. Four days. Almost a full year's national wildfire emissions, sent skywards in a single plume.

And yet the policy conversation in Westminster, in Holyrood, and in the offices of certain well-funded conservation charities continues as though none of this is happening.

The Stanford team identified two principal conditions that allowed Dava to burn as it did: unusually dry weather and, critically, flammable vegetation. That second phrase deserves attention. "Flammable vegetation" is the scientific language for what gamekeepers, shepherds and moorland managers have been warning about for the better part of a decade. It means rank, unmanaged heather. It means accumulated fuel load. It means a landscape where the natural cycle of cool, controlled burning — the practice that has shaped and protected British uplands for generations — has been suppressed, restricted, demonised and increasingly prohibited.

Cool burning, properly conducted under strict conditions by trained practitioners, removes the older, woodier heather growth that turns moorland into a tinderbox. It does so at low temperatures that protect the peat beneath. It creates the firebreaks and mosaics of vegetation that stop a stray spark from becoming a thousand-acre catastrophe. It is, quite simply, the difference between a moor that can absorb a hot dry summer and a moor that cannot.

The campaign to end this practice has been relentless. It has been waged by conservation bodies who have never managed a moor, by activists who confuse all flame with all harm, and by policymakers who have proved themselves more responsive to urban sentiment than to upland evidence. They have succeeded in shrinking the area where controlled burning may legally take place. They have succeeded in stigmatising those who carry it out. They have succeeded in building a regulatory architecture that treats the careful winter burn as a greater threat than the catastrophic summer wildfire.

The consequences are now measurable in tonnes of carbon dioxide.There is a bitter irony in this. The same voices most exercised about climate change have championed the very policies that have allowed a thousand years of stored carbon to be released in less than a working week. The same organisations that fundraise on the promise of protecting peatland have lobbied against the management practices that keep peatland intact. The same campaigners who decry the emissions of British agriculture have helped engineer the conditions for emissions on a scale that dwarfs anything a flock of sheep could produce.

This is not a problem of intent. It is a problem of evidence being subordinated to ideology. The peer-reviewed science is now catching up with the practitioner knowledge that has existed all along. Stanford's researchers note, with diplomatic understatement, that peatlands "have served as long-term carbon reservoirs" and require "more attention" when wildfires strike. What they are too polite to say, but what the data shows plainly, is that leaving these landscapes unmanaged is not preservation. It is preparation — for fire.

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The Scottish Government has acknowledged the problem. Its new Strategic Action Plan on Wildfires recognises that the threat is serious and escalating. This is welcome. But strategy documents do not extinguish flames, and inter-agency coordination, however improved, cannot substitute for the prevention work that takes place months and years before any fire begins. That work is done by gamekeepers and land managers, with drip torches and weather windows, in the depths of winter when nobody is watching and nobody is thanking them.

It is time for the policy debate to catch up with the science, and for the science to be heard above the noise of those who would prefer the moors to burn rather than be managed. Because the alternative — the future being mapped out for us by the anti-burning lobby — is now scientifically documented. It looks like Dava Moor. It looks like 29,225 acres of charred earth. It looks like a thousand years of carbon, gone in four days.

The British uplands are not Californian forests. They do not have to be. But they will be, if those who govern their management continue to ignore the people who actually know how to keep them safe.

The fire next time will be larger. The science says so. The only question is whether anyone is listening.