How to Report a Suspected Gas Leak Safely

A gas leak is not a problem to investigate, monitor or leave until morning. If you can smell gas, hear a hissing sound near pipework or an appliance, or suspect a damaged gas supply, act straight away. Knowing how to report suspected gas leak concerns quickly can protect everyone in the property and reduce the risk of fire, explosion or carbon monoxide exposure.

For homeowners, tenants, landlords and letting agents, the priority is simple: make the property safe first, then get the right emergency support and a qualified engineer involved.

What to do if you suspect a gas leak

Leave the building if there is a strong smell of gas, you can hear gas escaping, or anyone feels unwell. Warn other occupants as you leave, but do not delay to collect belongings or investigate the source. Move to a safe distance outside, away from the building.

Once you are outside, call the National Gas Emergency Service on 0800 111 999. This number is free and operates 24 hours a day. Tell the adviser where you are, what you can smell or hear, whether the gas supply is still on and whether anyone is feeling ill. Follow their instructions carefully.

If there is an immediate fire, explosion, serious danger or a person is unconscious, call 999 as well. Do not re-enter the property until you have been told it is safe to do so.

Do not create a spark

Gas can ignite from a very small spark. Avoid using electrical switches, doorbells, plugs, chargers, torches or household appliances in the affected property. Do not smoke, light a match, use a lighter or start a vehicle close to the building.

If it is safe and straightforward to do so, turn off the gas supply at the emergency control valve. This is usually beside the gas meter. Turn the handle a quarter turn so it sits across the pipe. Do not attempt this if you need to pass through a strong gas smell, enter an enclosed area or put yourself at risk.

Open doors and windows on your way out if they are easy to reach. Do not stay inside to ventilate the building. Fresh air helps disperse gas, but personal safety comes first.

How to report a suspected gas leak from a rented property

Tenants should report the emergency to the gas emergency service first, not wait for landlord approval. A suspected leak is an urgent safety issue, and reporting it promptly is the right action even outside normal office hours.

After calling the emergency service and leaving the property, contact the landlord or letting agent. Give clear facts: the address, time the smell or sound was noticed, whether the gas was shut off, whether emergency engineers attended and whether anyone has symptoms. A short written message is useful because it creates a record of the report.

Landlords and agents should respond without delay. Arrange for a Gas Safe registered engineer to inspect the installation, appliance or pipework once the emergency service has made the property safe. Do not ask a tenant to turn an appliance back on, relight a pilot or test for a smell.

A gas emergency visit may isolate the supply or cap off an appliance. That makes the immediate situation safer, but it does not necessarily identify and repair the underlying fault. A qualified engineer should establish the cause before gas is restored.

Signs that should never be ignored

The familiar sulphur-like smell is the most recognised warning sign, because natural gas has an odour added to make leaks easier to detect. However, not every issue presents in the same way. A hissing or whistling noise from a meter, pipe or appliance can indicate escaping gas. Dead or discoloured plants near an external gas pipe may also warrant investigation.

Problems around a boiler, gas fire or gas hob can sometimes be confused with normal appliance smells. A brief smell when lighting a gas hob may be caused by unburnt gas before ignition, but it should disappear immediately. If the smell persists, grows stronger or returns when the appliance is off, stop using it and report the concern.

Do not rely on your sense of smell alone. Carbon monoxide has no smell, taste or colour. It is produced when gas appliances do not burn correctly or ventilation is inadequate, rather than from a straightforward gas leak.

Common carbon monoxide warning signs include headaches, dizziness, nausea, breathlessness, confusion and unusual tiredness, particularly when symptoms improve away from the property. Black marks around an appliance, lazy yellow flames instead of crisp blue flames, and excessive condensation can also indicate unsafe combustion. Get into fresh air, seek urgent medical advice and have the appliance checked by a Gas Safe registered engineer.

What landlords need to do after a gas leak report

A landlord’s duty does not end when the gas supply has been isolated. Under the Gas Safety (Installation and Use) Regulations, landlords must keep gas appliances, flues and associated pipework in a safe condition. They must also arrange an annual gas safety check for relevant rented properties and provide tenants with a copy of the current gas safety record.

Following a suspected leak, treat the issue as a repair and safety management task. Keep a record of the tenant’s report, emergency service attendance, engineer findings, remedial work and any appliance warning notice. This is practical evidence that you acted promptly and helps avoid confusion at a later inspection or tenancy changeover.

The correct next step depends on the fault. A loose connection may be repaired quickly, while damaged pipework, a defective boiler component or poor flue performance may require replacement parts, further testing or a temporary alternative for heating and hot water. The property should not be treated as ready to occupy until the engineer confirms the relevant installation is safe.

An annual CP12 gas safety certificate is essential for landlords, but it is not a substitute for responding to faults between inspections. A certificate confirms the appliances and installation were checked on that date. It cannot predict a later failure, accidental damage or developing defect.

When to call an engineer after the emergency service

Call a Gas Safe registered engineer when the emergency service has attended, when an appliance has been capped or isolated, or when you have concerns about a gas appliance even if no active leak is confirmed. The engineer can carry out tightness testing, inspect the appliance, identify defective components and complete safe repairs.

For landlords in Bournemouth, Poole and Christchurch, fast local attendance is particularly useful where a tenant has been left without heating, hot water or cooking facilities. Speed matters, but it should never mean cutting corners. Ask whether the engineer is Gas Safe registered and appropriately qualified for the type of work required, especially for boilers, cookers, fires or LPG installations.

Do not use a general handyman for gas repairs. Gas work must be completed by a competent, properly registered engineer. This protects the occupants, the property and the landlord’s compliance position.

Preventing repeat gas safety problems

Most emergency reports are not caused by neglect, but regular maintenance makes serious problems less likely and helps faults get picked up early. Book an annual boiler service, arrange the required landlord gas safety check before the current record expires, and ensure tenants know where the gas meter and emergency control valve are located.

Provide tenants with a clear emergency contact process at the start of the tenancy. They should know to call 0800 111 999 for a suspected gas escape, then inform the landlord or managing agent. This avoids the dangerous assumption that they must wait for permission before acting.

Keep vents, flues and boiler cupboards clear. Do not cover air vents, block terminal openings outside or allow unqualified people to alter gas pipework. If a boiler starts losing pressure repeatedly, making unfamiliar noises or displaying fault codes, arrange an inspection rather than repeatedly resetting it.

A suspected gas leak is one of the few property issues where waiting can make matters worse. Get outside, report it from a safe place and arrange qualified follow-up work before anyone uses the gas supply again.