Recognising the signs of a gas leak quickly can protect your household. Call 020 7183 4810 for a Gas Safe inspection at the first sign of concern.
If you smell gas right now
Turn off the gas at the emergency control valve, open windows and doors, avoid naked flames, switches or your phone inside, and leave the property immediately.
Need a Gas Safe engineer today?
Same day callouts across Central and West London, fixed quotes and fully guaranteed work.
Call the National Gas Emergency Service on 0800 111 999, then call us on 020 7183 4810 once it is safe.
Signs of a possible gas leak
- A distinctive rotten-egg smell (an odorant added to natural gas)
- A hissing sound near a gas pipe or appliance
- Dead or discoloured vegetation near an outdoor gas line
- Bubbles in standing water above a gas line
- Physical symptoms like dizziness, headaches or nausea that ease when you leave the property
Concerned about a gas leak?
Gas Safe registered inspection across London.
Why we do not recommend trying to find the leak yourself
| Common online advice | Why it falls short |
|---|---|
| “Use soapy water to find the leak” | Only works on accessible, visible pipework, and delays getting proper help while a leak continues. |
| “Open a window and it will clear” | Ventilation helps temporarily but does not fix the leak itself, which needs a Gas Safe engineer. |
What it costs to wait
Gas leaks are a serious safety risk, including fire, explosion and carbon monoxide poisoning. There is no safe amount of time to delay once you suspect a leak.
How Olia’s Plumbing & Heating handles it
- Call 020 7183 4810 once you are safely away from the property
- Our Gas Safe registered engineer attends and traces the source
- We repair the leak and confirm the property is safe
Get a Gas Safe inspection today
Fast, thorough response across London.
Frequently asked questions
What does gas actually smell like?
Natural gas itself is odourless — suppliers add a distinctive sulphurous, rotten-egg smell so leaks can be detected.
Should I call 0800 111 999 or my plumber first?
Always call the National Gas Emergency Service on 0800 111 999 first if you suspect a leak, then call us to make the installation safe afterwards.
Can a leak happen even with a serviced boiler?
Yes, leaks can occur in pipework or appliances at any time — regular servicing reduces the risk but does not eliminate it entirely.
Trust the warning signs. Call 020 7183 4810 for a Gas Safe inspection.
Related services: Gas Leak Detection Central London, Gas Safe Engineer London, Why Is Gas Safety Necessary
Peyman
CEO & Founder — Gas Safe Registered Engineer
Peyman is the founder of Olia's Plumbing & Heating, a London based team with over 15 years of hands on experience in boiler installation and repair, central heating, gas work and emergency plumbing. He personally oversees jobs across Central and West London and writes these guides to help homeowners understand their heating systems.
- Gas Safe Registered
- 15+ years experience
- Covering all of London
