Gas Leak Repair London
Smell gas or suspect carbon monoxide? Leave the property, avoid flames and electrical switches, and call the National Gas Emergency Service on 0800 111 999 from a safe location. After the emergency service makes the situation safe, Plumbing 4 London can assess and repair relevant domestic natural-gas faults.

Safety-First
Gas Leak Repair in London
A suspected gas escape is an emergency-service matter first, not a routine booking. Once National Gas has made the situation safe, follow-on work is limited to the verified domestic natural-gas scope of Alexandru Cirstea, Gas Safe licence 6088497.
Correct Emergency Route
Leave the property and call National Gas on 0800 111 999 from a safe location before arranging a repair.
24/7 Follow-on Help
We are available 24/7 to discuss follow-on repair work after the emergency service has made the situation safe.
Verified Registered Scope
Gas work is carried out by Alexandru Cirstea, licence 6088497, within the listed domestic natural-gas categories.
Transparent Estimate
The fault, access and proposed work are assessed before a clear repair estimate is agreed, with no hidden additions.
London Service-Area Coverage
We serve London and aim to attend within the hour, subject to location, traffic and engineer availability.

Do not try to confirm or locate a suspected gas escape yourself. Any one of these signs is enough to leave the property and contact National Gas on 0800 111 999 from a safe location.
A Gas-Like Odour
Do not investigate the source. Leave the property, avoid switches and flames, and call the emergency number from a safe location.
Hissing Near Gas Equipment
Treat an unexplained hissing sound near gas pipework or an appliance as a reason to leave and call National Gas.
Carbon-Monoxide Alarm or Symptoms
If an alarm sounds or occupants feel unwell, leave for fresh air and seek emergency advice. Do not re-enter to investigate.
Unexpected Appliance Shutdown
Stop using the affected appliance. If gas or carbon monoxide may be present, follow the emergency route before repair assessment.




What our clients say
We take pride in providing top-tier property maintenance services to clients throughout London.
Posted on Google HarryTrustindex verifies that the original source of the review is Google. Our boiler suddenly stopped working on a freezing morning. I contacted UK Gas Engineer Ltd and they had an engineer out the same day. He quickly found the fault explained everything in simple terms and had the heating back on within the hour. Fantastic service.Posted on Google KashifTrustindex verifies that the original source of the review is Google. Very reliable and honest team. They explained the issue clearly before starting the work. Fair pricing and quality service.Posted on Google Allison WhitneyTrustindex verifies that the original source of the review is Google. We had a leaking bathroom drain and Alex was quick to respond and fix the issue. Prompt and professional, I would highly recommend!Posted on Google Ben SheltonTrustindex verifies that the original source of the review is Google. Alex has pulled through and my boiler issues are totally sorted. Expansion vessels replaced, fan and mechanical issues sorted, and yearly maintenance done. Solid guy, solid service. Recommend!Posted on Google Satheesh NadarajahTrustindex verifies that the original source of the review is Google. Can’t speak well enough of Alex - so helpful and prompt with service. Recommend very highly!Posted on Google Serena ReidTrustindex verifies that the original source of the review is Google. Came home from on holiday on 03/01/26 to the boiler not working - not heating or hot water - on one the coldest days of the winter. Was calling round desperately to find emergency plumber at 8pm on a Saturday. Despite calling multiple plumbers, none could come until the Monday...Then there was Alex! He came round on that Saturday night, found the problem and made a plan to replace the broken part. He was AMAZING! He was upfront about costs, timings, issues and part sourcing. Within 72 hours (part sourcing and error code issues that, were unrelated to Alex, were an issue) We had our boiler back working. Very grateful to Alex, who was so in demand and worked like trooper, would 100% recommend himPosted on Google Jasmine KershawTrustindex verifies that the original source of the review is Google. Can’t recommend highly enough! Alex arrived quickly and fixed our leaking water heater in a jiffy. He gave some great, honest advice and charged exactly what he said he would (a very good price). Efficient and friendly - will definitely be saving his number for future plumbing crises.Posted on Google Leo JasminTrustindex verifies that the original source of the review is Google. Alex sorted out all the problem in my boiler, great service and friendly, highly recommended for boiler and heating problems👍
Gas Leak Repair
Frequently Asked Questions
What should I do if I suspect a gas leak?
Leave the property, avoid flames and electrical switches, and call the National Gas Emergency Service on 0800 111 999 from a safe location. Follow its instructions and do not arrange routine repair work until the emergency situation has been made safe.
Can I safely check where a gas smell is coming from?
No. Do not search for the source, test appliances or operate switches. A smell, hissing sound, carbon-monoxide alarm or unexplained symptoms is enough to leave and call National Gas from a safe location.
Why must a suspected gas leak be treated as an emergency?
A gas escape can create fire, explosion and health risks, while carbon monoxide cannot be reliably detected by smell. Leave the property and use the national emergency route instead of trying to judge the severity yourself.
What happens after National Gas makes the situation safe?
Once the emergency service confirms the situation is safe, we can assess relevant domestic natural-gas pipework or appliance faults. We explain the proposed scope and provide an estimate before follow-on work begins.
Can I repair a gas leak myself?
No. Never dismantle, alter or repair gas pipework or appliances yourself. Follow the emergency instructions first and use a suitably registered Gas Safe engineer for any subsequent gas work.
Do you provide 24/7 follow-on gas repair help?
Yes. Plumbing 4 London is available 24/7 for follow-on repair enquiries after the emergency service has made the situation safe. We aim to attend within the hour, subject to location, traffic and engineer availability.
How long does follow-on gas repair take?
The time depends on the fault, access, appliance and any parts required. We provide a timeframe after assessment rather than promising a fixed repair duration before the issue is known.
How can I reduce gas-safety risks at home?
Follow manufacturer servicing guidance, use a suitably registered engineer for gas work, keep vents unobstructed and maintain a correctly positioned carbon-monoxide alarm. These measures support safety but do not replace emergency action.
Which parts of London do you serve?
We serve customers across London as a service-area business. Attendance depends on location and engineer availability; the exact appointment window is confirmed when you contact us.
Follow-on Gas Repairs
Across London
Plumbing 4 London serves London as a service-area business. We are available 24/7 for follow-on repair enquiries, but National Gas on 0800 111 999 is always the first contact for a suspected gas escape or carbon-monoxide emergency.

Safety-First
Gas Leak Repair Process
Our role begins after the National Gas Emergency Service has made the immediate situation safe. Any registered gas work is then limited to the verified domestic natural-gas scope of Alexandru Cirstea, Gas Safe licence 6088497.
- Leave the property
- Avoid switches and flames
- Call National Gas: 0800 111 999
- Follow emergency instructions
- Do not investigate the source
- Do not re-enter to test appliances
- Arrange repair only when safe
- Domestic gas pipework
- Boilers and central heating
- Cookers and hobs
- Domestic gas fires
- Domestic water heaters
- Exact appliance confirmed
- Verified registered scope only
- Post-emergency fault assessment
- Clear proposed repair scope
- Transparent estimate before work
- No hidden additions
- Parts requirements explained
- Likely duration explained
- Guaranteed workmanship
- 24/7 follow-on enquiries
- London service-area coverage
- Availability confirmed at booking
- Gas Safe licence 6088497
- National Gas remains first contact
- No DIY gas-work advice
- Manufacturer guidance respected
