The UK Health Security Agency (UKHSA) has issued a warning about the dangers of carbon monoxide (CO) poisoning as the colder months approach. Each year, around 20 people die in England and Wales from unintentional CO poisoning, with many more hospitalised. The risk increases in autumn and winter when people spend more time indoors with heating on and windows closed.
Carbon monoxide is a colourless, odourless gas that cannot be seen, smelled or tasted, making it particularly dangerous. The UKHSA advises that recognising symptoms is crucial, as they may come and go. Key warning signs include symptoms that worsen in a particular room or building and improve when leaving that area. Headaches, dizziness, nausea, breathlessness, collapse and loss of consciousness are all possible indicators.
Common household appliances, such as boilers, gas cookers and fireplaces, can produce carbon monoxide if not properly installed, maintained or if they are faulty. Smaller rooms with these appliances are especially risky because CO concentrates more quickly in confined spaces. The UKHSA emphasises that every CO death is preventable.
To stay safe, the agency recommends installing carbon monoxide detectors, servicing appliances annually, ensuring proper ventilation, and never using outdoor appliances indoors. If a gas leak is suspected, the National Gas Helpline (0800 111 999) should be called immediately; it is available 24/7. The UKHSA urges everyone to check alarms, book services and learn the symptoms to protect themselves and their loved ones this winter.
