Gas Warning Notice

Gas safety warning labels and unsafe categories


If a gas-related danger is identified in your home, your engineer will attach a ‘Danger Do Not Use’ warning label to the relevant appliance or fitting. They will also provide you with a gas warning notice too. This notice will contain precise details of the unsafe situation.


There are two types of unsafe categories:

Immediately dangerous (ID)

An installation that’s been classified as ‘immediately dangerous’ is considered an immediate danger to life and property if left operating.

The appliance will be disconnected with your permission. You won’t be able to use the installation until it’s been repaired and made safe.

If you don’t give permission to your engineer to disconnect the installation it will be reported to the Gas Emergency Service Provider (ESP). The ESP has legal powers to disconnect the gas supply and make the situation safe. However, it’s worth noting that this doesn’t apply to liquid petroleum gas (LPG) installations.

At risk (AR)

This classification means one or more recognised faults have been found that could constitute a danger to life or property without further faults developing.

With your permission your engineer will turn off the appliance, which shouldn’t be used again until it’s been fixed.

In limited circumstances, turning off the gas supply won’t reduce the risk. If this is the case, your engineer will give you a warning notice and tell you who you need to contact.

Extra information

If your installation doesn’t comply with current standards, whether you take action on this is completely up to you. However, it’s always a good idea to bring an installation up to date.

For more information on gas warning notices please see our full Terms & Conditions.

Have concerns about the safety of your gas appliance or would like to get in touch regarding a Gas Warning Notice? please contact us.