CO is a poisonous, colourless, tasteless and odourless gas that is produced when carbon-based fuels, such as gas, are burnt.
CO can be produced when a gas appliance has been incorrectly fitted, badly repaired or poorly maintained. It also occurs if flues, chimneys, or vents are blocked.
The Gas Safe Register is the official list of gas engineers who are qualified to work safely and legally on gas appliances.
You can buy an alarm for around £15 from a local DIY store, supermarket or online. Alternatively, contact your energy supplier. Always ensure your CO alarm has the BSI Kitemark.
the number to call to check your engineers ID and that he or she is on the Gas Safe Register. Visit www.gassaferegister.co.uk for more information.
Turn off gas appliances immediately, open doors and windows and leave the property.
See your doctor immediately or go to hospital and let them know that you suspect CO poisoning. They can do a blood or breath test to check.
Call the National Gas Emergency Service on 0800 111 999 A qualified engineer will arrive within one hour if a gas escape is suspected inside a property, or two hours outside a property. They will check for gas and make the property safe.
Get a Gas Safe registered engineer to inspect your gas appliances and flues to see if there is a fault before they carry out the appropriate repairs.
the number to call if you smell gas or suspect CO poisoning.