On Wednesday evening, smoke began rising over Dunwich Heath on the Suffolk coast — a landscape so ecologically significant that it sits beside one of Britain's most closely watched nuclear power stations and shelters bird species found almost nowhere else in the country. By Friday, more than 100 firefighters were still battling the blaze, which had consumed approximately 150 hectares of protected heathland and forest across the National Trust's Dunwich Heath reserve and the neighbouring RSPB Minsmere nature reserve. That is roughly the equivalent of 210 football pitches of vegetation reduced to ash. The scale of destruction has alarmed conservationists and emergency managers in equal measure.

Suffolk Fire and Rescue described the situation as a "major incident" that remained "dynamic and potentially changeable," even as a helicopter capable of dropping 1,000 litres of seawater on each pass worked alongside six London Fire Brigade appliances. Russell Clement, the National Trust's general manager for the Suffolk coast, said the reserve had become "unrecognisable," while the trust's director general, Hilary McGrady, launched an emergency fundraising appeal on Friday and warned that "precious habitats, wildlife, trees, and a place where people have made memories over generations" had been lost. The ecological cost may prove the most enduring. Minsmere is home to nightjars, nightingales, and Dartford warblers — among the UK's rarest breeding birds.

Adam Rowlands, the RSPB's area manager for the reserve, described watching nightjars fleeing a 20-foot fireball. He warned that birds which survived the flames were still "likely to perish" because suitable feeding and breeding habitat no longer exists for them. Re-establishing the vegetation to its previous condition, he estimated, would probably take decades. Dunwich Heath draws 100,000 visitors each year, yet its fragility had long been apparent to ecologists who study how lowland heathland responds to rising summer temperatures and prolonged drought.