The UK government set out plans on 26 October 2026 to phase out the use of high-concentration carbon dioxide for stunning pigs in British slaughterhouses, according to the Department for Environment, Food & Rural Affairs. The proposals would move the pork industry toward alternatives such as argon gas and automated electrical stunning, which the department described as proven to substantially reduce animal suffering. The government said independent evidence had raised serious concerns about the distress CO2 causes pigs before they lose consciousness.

The announcement opened a consultation running from that date until 21 December 2026, seeking views on welfare benefits, costs, feasibility and potential timescales, with recognition that businesses will need time to adapt. Farming Minister Stephen Morgan said the government was committed to supporting farmers and businesses through the transition. Madeleine Campbell, chair of the Animal Welfare Committee, said continuing high-concentration CO2 use was ethically unacceptable when more humane, legally permitted alternatives exist.

The government said it has worked with pig processors, equipment manufacturers, gas suppliers and welfare organisations since April 2024 on the practicalities. It also said the plans would reduce the industry's dependence on carbon dioxide supplies, which can be affected by international events.