Carbon monoxide (CO) can be a hidden killer during the summer months, and with many of us heading away on camping, caravanning or boating holidays, the Public Health Agency (PHA) is urging holidaymakers to be aware of the risk of carbon monoxide poisoning in enclosed spaces. While carbon monoxide is usually associated with domestic fossil fuel-burning appliances, incidents and even deaths can also occur in caravans and on boats. “Carbon monoxide can build up very quickly in enclosed spaces to levels that can kill,” said Hilary Johnston, Health and Social Wellbeing Improvement Manager at the