The UK’s domestic wood-burning stove industry has moved to legally intimidate local councils that run public campaigns warning residents about the severe health risks posed by air pollution from their products.
Research by the British Medical Journal (BMJ) has revealed that at least eight London boroughs received legal threats in late 2023 from the Stove Industry Association (SIA). The complaints centred on council flyers using slogans such as “careless, not cosy,” which the industry lobby group claimed breached advertising codes. This aggressive stance represents a direct challenge to local authorities’ efforts to inform the public, creating what campaigners describe as a chilling effect on public health messaging.
Industry pressure extends beyond legal threats
The campaign of pressure extends further. The SIA lobbied a further seven councils over wood burning, with some of its material making claims that the practice provided “health and wellbeing benefits,” including lowering blood pressure. Oxford City Council received a complaint from the SIA in December 2022 over a public health campaign, though it stopped short of legal action. Separately, Brighton and Hove City Council was subject to a complaint by Hove Wood Burners, an SIA member, to the Advertising Standards Authority (ASA) over its “cosy killer” campaign.
The SIA has defended its correspondence, stating its aim was to ensure council marketing was “proportionate, contained a balanced view and, most importantly, distinguished clearly between open fires, older appliances and modern eco-design-compliant stoves.” However, the Association itself has fallen foul of advertising regulators. In November 2025, the ASA banned two SIA advertising claims that modern stoves had “very low emissions,” ruling them misleading and unsubstantiated. The regulator noted that while modern stoves emitted less fine particulate matter (PM2.5) than open fires, they could emit more of this pollutant than older stove types and higher levels of others like sulphur dioxide.
The stark health evidence behind the warnings
The councils’ campaigns are grounded in robust and alarming scientific evidence. Domestic wood burning is a major source of air pollution in the UK, contributing to about 20% of fine particulate matter (PM2.5) emissions—a share comparable to, and by some estimates now surpassing, road transport. In London, it accounted for 17% of particulate pollution in 2019.
PM2.5, considered the most harmful pollutant to human health by the World Health Organization, penetrates deep into the lungs and bloodstream. Exposure is linked to a devastating range of illnesses, including asthma, bronchitis, heart disease, stroke, lung cancer, miscarriage, and dementia. Air pollution is now associated with more than 700 illnesses, with non-essential wood burning a significant contributor. Recent research suggests wood burning is associated with approximately 2,500 deaths per year in the UK, with domestic burning also linked to thousands of new cases of diabetes and asthma annually.
While the industry promotes newer “eco-design” compliant stoves as a cleaner alternative, they still produce significant pollution. Such stoves can emit about 450 times more toxic air pollution than a gas boiler and research indicates they can still release harmful ultrafine particles into the home during normal use. The Chief Medical Officer for England, Professor Chris Whitty, has repeatedly warned about worsening indoor air pollution from wood burners.
Jemima Hartshorn, founder of the campaign group Mums for Lungs, said she was shocked by the findings of the BMJ investigation. “This is straight from the playbook of tobacco,” she told the Guardian. “The industry body is talking the health evidence down in order to stop public bodies from informing the public of health dangers.”
A critical consultation and calls for stronger action
The conflict unfolds as the UK government runs a consultation on domestic wood and solid fuel burning, which closes on 19 March 2026. The proposals include stricter emission limits for new stoves, mandatory health impact labelling on appliances and fuel, and increased penalties for regulatory breaches.
However, health campaigners and charities have criticised the consultation for failing to offer any option to ban or restrict wood burners in urban areas, where their use is often supplementary and particularly damaging to neighbours’ health. Asthma + Lung UK said the proposals “fall well short” of protecting lung health, as they largely ignore pollution from existing stoves. Campaigners have likened the approach to advising smokers to switch to low-tar cigarettes—a marginal improvement that still carries high risk.
The Department for Environment, Food and Rural Affairs (Defra) stated: “Dirty air robs people of their health and costs our NHS millions each year… We are consulting on taking action to reduce emissions from domestic burning, and their impact on the health of householders and their neighbours.”
The backdrop to the debate is a significant rise in stove ownership, now found in about one in ten UK households, driven partly by promotion from interior designers and fashion brands. While some are in rural areas with fewer heating options, an increasing number are in densely populated urban settings. With the SIA citing an unpublished, industry-funded literature review to claim “no scientific evidence” for adverse health effects from modern stoves, the battle between public health information and industry lobbying is set to intensify as the government’s consultation deadline approaches.
