A consultation opened today, and it closes on 21 December
What happened
The Government has opened a consultation on ending the use of high-concentration carbon dioxide to stun pigs in British slaughterhouses. Stunning is the step that makes an animal unconscious before slaughter. In much of the pork industry, pigs are lowered into a chamber filled with a high concentration of CO2. The method is efficient and widely used. The problem is what happens in the seconds before unconsciousness: independent evidence has raised serious concerns that pigs experience panic and breathing difficulties. Defra proposes replacing it with alternatives such as argon gas and automated electrical stunning, which the Government says substantially reduce suffering. The consultation opened on 26 October 2026 and runs until 21 December 2026. It asks about welfare benefits, costs, feasibility and possible timescales. No end date for CO2 use has been set, and the Government says businesses need time to adapt. This has not come out of nowhere. Defra says it has worked with pig processors, equipment manufacturers, gas suppliers and animal welfare organisations since April 2024 on the practicalities, and on limiting any cost to shoppers. The commitment to consult came out of the Government’s animal welfare strategy. Farming Minister Stephen Morgan said “pigs are intelligent animals that deserve to be treated with care and respect throughout their lives”, and that “the public want to know the meat they buy in the shops is produced in a way that supports high standards”.
Why this matters
Most people never think about stunning, and that is part of why it changes slowly. The case for change here is unusually clear from the body that advises ministers. Madeline Campbell, who chairs the Animal Welfare Committee, said the committee views the continued use of high-concentration CO2, when more humane and legally permitted alternatives exist, as ethically unacceptable. She described the evidence-based argument for moving away from it as incontrovertible on animal welfare grounds, and urged the change to happen “within a transition period which is as short as possible”. That is strong language from an advisory committee. There is also a reason to act that has nothing to do with welfare. The industry depends on carbon dioxide supply, and that supply is vulnerable. Defra notes that potential shortages linked to conflict in the Middle East earlier in 2026 exposed weaknesses in global gas supply chains. A slaughterhouse that cannot get CO2 cannot operate. Moving to argon or electrical stunning reduces that dependency. It is worth noting the UK is heading in a different direction from its neighbours here. The European Commission has signalled it will not ban high-concentration CO2 stunning.
What the evidence actually says
Three things deserve a clear-eyed look. First, this is a consultation, not a ban. Nothing has changed in any slaughterhouse today. The consultation runs to 21 December, and the Government has not published a transition length or a cost figure. Anyone saying CO2 stunning has been banned is ahead of the facts. Second, the welfare case and the cost case point in different directions, and the industry has said so. Farmers Weekly has reported an AHDB-commissioned study putting electrical stunning at around £1.11 per pig against roughly 42p for CO2. Industry bodies, including the National Pig Association, have argued there are no commercially viable alternatives at scale yet and have called for an evidence-based approach. Those are real objections from people who would have to make the change work, and the consultation exists partly to test them. Third, timescales are unsettled. The Animal Welfare Committee has recommended as short a transition as possible, and a five-year figure has been reported as its advice. That is advice, not law. Phase-out periods of around three years have also been discussed. None of this is fixed. So the honest position is: the welfare evidence is strong and the Government’s advisers are unambiguous, while the practical and financial questions are genuinely open. That is exactly what a consultation is for.
Practical advice
If you have a view, this is one of the rare moments when sending it somewhere actually counts. The consultation is open until 21 December 2026 on GOV.UK, and it is open to the public, not just the industry. Responses that answer the questions asked — about costs, feasibility and timescales — carry more weight than general statements of feeling. If you farm pigs or work in processing, the questions on cost and feasibility are the ones where first-hand knowledge is worth most. Your trade association will likely be coordinating a response, but an individual response from someone running a real plant is a different kind of evidence. As a shopper, there is no label today that tells you which stunning method was used, so looking for one will not help. Higher-welfare assurance schemes cover other parts of a pig’s life — space, bedding, outdoor access — and those are visible on packs. If welfare matters to you, those marks are the current practical lever. And if you want to follow what happens next, the thing to watch is the transition period in the Government’s response, not the headline. That number will decide whether this changes anything in practice.
What to know
Defra opened a consultation on 26 October 2026 on phasing out high-concentration carbon dioxide stunning of pigs in British slaughterhouses. It closes on 21 December 2026. Proposed alternatives are argon gas and automated electrical stunning. Independent evidence raised serious concerns that high-concentration CO2 causes panic and breathing difficulties before pigs lose consciousness. The Animal Welfare Committee has called continued use ethically unacceptable where better alternatives exist. A second motive is supply security: potential CO2 shortages linked to conflict in the Middle East earlier in 2026 exposed vulnerabilities in gas supply chains. No ban or timetable has been set. The industry has raised cost and feasibility objections, with reported figures of roughly £1.11 per pig for electrical stunning against about 42p for CO2. The European Commission has indicated it will not ban the practice. The consultation is open to the public on GOV.UK until 21 December. Sources: Department for Environment, Food and Rural Affairs, “New plans to end carbon dioxide stunning of pigs to prevent suffering”, GOV.UK, 26 October 2026, https://www.gov.uk/government/news/new-plans-to-end-carbon-dioxide-stunning-of-pigs-to-prevent-suffering; Farmers Weekly, “Banning CO2 pig stunning will place high cost on industry”, https://www.fwi.co.uk/livestock/pigs/banning-co2-pig-stunning-will-place-high-cost-on-industry; National Pig Association, “NPA calls for evidence-based approach after Defra publishes welfare strategy”, https://nationalpigassociation.co.uk/npa-calls-for-evidence-based-approach-after-defra-publishes-welfare-strategy/ This article is for general information and does not replace advice from a doctor, pharmacist or other qualified healthcare professional.
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