Installers, landlords and some gas suppliers have a duty to prevent injury to consumers and the public from either carbon monoxide poisoning or fire and explosion.
What law applies?
In particular, the regulations require gas installation businesses to:
Landlords have duties to ensure that the gas appliances and flues provided for tenants' use are maintained in a safe condition at all times and checked for safety each year by a Gas Safe Register engineer. The landlord should also give the tenant a copy of the check record.
This is a complicated area, so if you're working with gas, or if you're a landlord, you should read the section onon the Health and Safety Executive website.