If somebody is going to carry out gas work in your home, do not rely on a van logo, advert or verbal assurance. For homeowners in Great Britain, the Health and Safety Executive (HSE) says a gas engineering business must be on the Gas Safe Register to legally undertake gas work within the scope of the Gas Safety (Installation and Use) Regulations 1998. The person doing the work must also be qualified for that specific type of gas work.
Use the official register before work starts
HSE directs consumers to the Gas Safe Register to check whether an engineer or business is currently registered. Registration can be checked online, and HSE also lists the Gas Safe Register consumer helpline as 0800 408 5500.
This matters because an old certificate, advert, review or directory listing does not establish current registration. If a company is arranging the job, ask which engineer will actually attend where possible and check that individual rather than relying only on the business name.
Check the engineer's Gas Safe ID card
HSE says registered engineers carry a Gas Safe ID card. The front includes the engineer's photograph, registration details and expiry information. The reverse shows the categories of gas work the engineer is qualified to undertake, such as boilers, cookers or gas fires.
That second check is important. Being Gas Safe registered does not mean every engineer is qualified for every appliance or category of work. If the scope changes after inspection, check that the engineer remains qualified for the additional gas work.
Registration and competence are separate checks
HSE's guidance is explicit that domestic gas work must be carried out by a Gas Safe registered engineer who is competent in that area of gas work. A job title such as plumber, heating engineer or contractor is not enough on its own.
For example, HSE explains that a non-registered person may carry out some non-gas 'wet work' on a heating system, such as installing water pipes or radiators, but work on the gas boiler itself and the final connection to the boiler must be carried out by a Gas Safe registered engineer.
Use the same check when comparing quotations
Suppose a Northampton homeowner receives two quotations for boiler work. Before comparing price or availability, they can identify the engineer who would attend, check that person on the official register, inspect the ID card and confirm that the listed work categories cover the proposed job.
If the business later substitutes a different engineer, repeat the check for the person who actually arrives. Reviews, price and lead time may help choose between suitable businesses, but none of them replaces the registration and competence check.
What to do if details do not match
A mismatch in name, photograph, registration status, expiry information or work category should be resolved before gas work proceeds. HSE advises consumers to use the register to verify the engineer and their qualifications rather than guessing from trade descriptions or branding.
If you cannot verify that the person is appropriately registered and qualified for the job, use an engineer whose status you can confirm.
If you suspect an appliance or installation is unsafe
HSE's homeowner guidance says it is illegal to use a gas appliance if you know or suspect it is unsafe. It advises turning the appliance off and leaving it untouched until it has been checked by a Gas Safe registered engineer.
If you suspect a gas leak, HSE advises opening doors and windows, shutting off the gas supply at the meter control valve if you know how to do so safely, and calling the national Gas Emergency number on 0800 111 999.
Registration is not the whole hiring decision
Gas Safe registration addresses legal eligibility and competence for covered gas work; it is not a complete assessment of price, customer service or suitability for your project. You should still agree a clear written scope, quotation and approach to changes before work begins.
A practical sequence is: identify who will do the work, verify current registration, inspect the ID card, confirm the relevant work categories, then compare commercial factors such as scope, price and timing.
Sources and verification
- Health and Safety Executive — Gas Safe Register: legal registration requirement, ID-card information and work categories.
- Health and Safety Executive — Check an engineer: how consumers can verify an engineer and their qualifications.
- Health and Safety Executive — Gas safety for home owners: unsafe-appliance and gas-leak guidance.
- Health and Safety Executive — Who can do a gas safety check?: specific competence and the distinction between non-gas wet work and gas work.
Scope note: the legal references above are HSE guidance for Great Britain. Gas Safe registration also operates in other UK jurisdictions, but the applicable regulator and legal framework can differ.