How to Check the Gas Safe Register in London: A Homeowner Guide
Before any gas work is carried out in a London property, homeowners should verify that the engineer is Gas Safe registered. This guide explains how to check and what to look for.
Why Gas Safe Registration Matters
The Gas Safe Register is the official register of engineers who are legally allowed to work on gas appliances and installations in Great Britain. Gas Safe replaced CORGI as the gas safety registration body in 2009 and is appointed by the Health and Safety Executive. It is a legal requirement under the Gas Safety (Installation and Use) Regulations 1998 that all gas work — connecting appliances, installing pipework, servicing boilers, and repairing gas fittings — is carried out by a Gas Safe registered engineer. Working on gas without registration is a criminal offence for the engineer and hiring an unregistered person to carry out gas work exposes the homeowner to serious legal and safety risk.
In London, a significant proportion of gas work is carried out by sole traders and small companies. The presence of a van with a Gas Safe logo or a business card claiming Gas Safe registration does not automatically confirm current, valid registration. Gas Safe cards can be expired, covering the wrong appliance category, or in some cases fraudulent. Verifying directly with the Gas Safe Register takes thirty seconds and costs nothing.
How to Check the Gas Safe Register
Visit GasSafeRegister.co.uk and select "Check an engineer" from the main navigation. You can search by the engineer name, the business name, or the registration number on their Gas Safe card. The result confirms whether the engineer is currently registered, the date their registration expires, and — most importantly — which appliance categories they are qualified to work on. Gas Safe registration is not a single universal qualification — it is split into appliance categories such as domestic natural gas, LPG, commercial catering, and others. An engineer registered only for commercial work is not qualified to work on a domestic boiler, and vice versa.
When a Gas Safe registered engineer arrives at your London property, ask to see their Gas Safe identification card. This is a yellow card with their photograph, name, registration number, and a list of the appliance categories they are qualified for. The card has an expiry date — a valid card must be in date and must list the specific appliance category covering the work to be carried out. If the engineer cannot produce a valid card, do not allow gas work to proceed until registration has been confirmed online.
After the Work: What You Should Receive
After any notifiable gas work in a London property, the Gas Safe registered engineer records the work on the Gas Safe register. For a boiler installation, service, or repair, you should receive a commissioning sheet or service record showing the engineer name, registration number, work carried out, and the results of any safety checks. For a gas safety inspection (CP12), you receive a Gas Safety Certificate — a written document listing every gas appliance inspected, the outcome of each check, and any warnings issued. For a gas appliance installation, you receive commissioning paperwork confirming the tightness test result and the appliance is safe to use. Keep this documentation — it is required if you sell the property or make a future insurance claim related to gas. Contact Prestige Engineers for Gas Safe registered gas work across all London boroughs. Our registration number is available on the Gas Safe Register.