Gas Safe Register: How to Check a Plumber's Credentials

By The FixDelivered Team · Updated 2026-07-06 · 5 min read

When it comes to gas appliances and pipework in your home, safety is paramount. Faulty gas work can have devastating consequences, including carbon monoxide poisoning, fires, and explosions. This is why the Gas Safe Register exists, and why it's legally required for anyone working on gas installations to be on it. But what exactly is it, and how can you ensure the plumber you hire is legitimately registered?

What is the Gas Safe Register?

The Gas Safe Register is the official gas registration body for the United Kingdom, Isle of Man, and Guernsey. It was established in 2009, replacing CORGI as the regulatory body for gas safety. Its primary purpose is to protect the public from unsafe gas work. By law, any individual or business carrying out work on gas appliances or fittings must be on the Gas Safe Register.

Being Gas Safe registered means that an engineer has met the required qualifications and competency standards for working safely and legally with gas. It's not just a voluntary scheme; it's a legal requirement, and it's your assurance that the person working in your home has the necessary skills and is regularly assessed to maintain those standards.

Why is Gas Safe Registration So Important?

The dangers of unqualified gas work cannot be overstated. Here's why you should *never* allow an unregistered person to touch your gas appliances:

Carbon Monoxide Poisoning: This silent killer is a colourless, odourless gas produced by incomplete combustion. Faulty boilers, fires, or cookers can leak carbon monoxide, leading to serious illness or death.
Gas Leaks and Explosions: Incorrectly fitted or maintained gas pipework and appliances can lead to dangerous gas leaks, which pose a significant risk of fire and explosion.
Legal Compliance: It is against the law for anyone to work on gas appliances if they are not Gas Safe registered. Using an unregistered individual could also invalidate your home insurance.
Peace of Mind: Knowing your gas appliances have been installed or serviced by a qualified, registered professional gives you confidence in your home's safety.

What Work Requires a Gas Safe Registered Engineer?

Any work involving gas appliances or fittings in your home must be carried out by a Gas Safe registered engineer. This includes, but is not limited to:

Installing, repairing, or servicing gas boilers
Installing or repairing gas fires, cookers, and ovens
Working on gas meters (though typically this is done by your gas supplier)
Installing or repairing gas pipework
Checking for gas leaks
Landlord Gas Safety Checks (CP12 certificates)

If a plumber tells you they can work on your gas boiler but isn't Gas Safe registered, they are breaking the law and putting your safety at risk. Always insist on seeing their Gas Safe ID card.

How to Check if a Plumber is Gas Safe Registered

Verifying a plumber's Gas Safe registration is quick, easy, and essential. There are two main ways to do this:

1. Check Their Gas Safe ID Card

Every legitimate Gas Safe registered engineer carries a Gas Safe ID card. This card contains vital information you should check:

Photo: Ensure the photo matches the engineer.
Start and Expiry Dates: Check that the card is current and hasn't expired.
Licence Number: This is a unique number for the engineer.
Employer's Business Name: Verify this matches the company you hired.
Qualifications: The reverse of the card lists the types of gas work the engineer is qualified to undertake (e.g., boilers, cookers, fires). Make sure their qualifications cover the job you need doing.

If an engineer cannot or will not show you their ID card, do not let them work on your gas appliances.

2. Use the Official Gas Safe Register Website

You can also verify an engineer or business online:

Visit the official Gas Safe Register website (gassaferegister.co.uk).
Use the 'Check an engineer' or 'Check a business' tool.
Enter the engineer's licence number (from their ID card) or the business name/postcode.
The website will confirm their registration status and list the types of work they are qualified for.

What to Do if Your Plumber Isn't Registered

If you suspect someone is working illegally on gas without being Gas Safe registered, or if you have concerns about the safety of gas work carried out, you should:

Stop the work immediately.
Do not pay them for gas work.
Report them to the Gas Safe Register. They have a dedicated investigations team to pursue illegal gas workers.
Consider getting a second opinion from a Gas Safe registered plumber.

Finding a Qualified Gas Safe Engineer

When you need work done on your gas appliances, it's crucial to hire a qualified professional. FixDelivered connects you with local, vetted, and qualified emergency plumbers, including those who are Gas Safe registered for gas work. You can quickly tell us your emergency and we'll help you find a suitable engineer.

Remember, always verify their credentials before allowing any gas work to commence. It's a small step that can make a huge difference to your safety.

When to Call a Professional

For any work involving gas boilers, fires, cookers, or pipework, calling a Gas Safe registered professional isn't just recommended – it's a legal and safety imperative. Attempting DIY gas work is extremely dangerous and illegal. Even if you're just unsure about a pilot light or a strange smell, it's always best to err on the side of caution and contact a qualified engineer immediately. Your safety and the safety of your household depend on it. You can learn more about how FixDelivered works to find the right professional quickly.

Conclusion

The Gas Safe Register is your shield against unsafe gas work. Always take the time to check an engineer's ID card and verify their registration online. Prioritising safety over cutting corners will protect your home and your loved ones from potentially fatal consequences. If you need a trustworthy Gas Safe registered engineer, FixDelivered can help you find emergency plumbers near you.

Frequently asked questions

What is the difference between CORGI and Gas Safe Register?

The Gas Safe Register replaced CORGI as the official gas registration body in the UK on 1 April 2009. All gas engineers must now be on the Gas Safe Register to legally work on gas appliances.

Can a regular plumber work on my gas boiler?

No, not unless they are specifically qualified and registered with the Gas Safe Register for gas work. A plumber may be excellent with water systems, but gas work requires separate, specific training and registration.

What should I do if I suspect an illegal gas worker?

If you suspect someone is working illegally on gas without being Gas Safe registered, you should stop them immediately and report them to the Gas Safe Register via their website or helpline. Do not pay them for any gas work performed.

Need a plumber now? Tell us your emergency and FixDelivered will find and confirm an available local plumber near you, usually within the hour.

Written by the FixDelivered Team. Reviewed by Rupert Lowe, Editor. Last updated 2026-07-06.