If you smell gas — call 0800 111 999 immediately
National Gas Emergency Service — free, 24/7. Open windows, leave the property, do not use electrical switches.
24/7 Gas Safe registered emergency engineers across London. If you smell gas, call 0800 111 999 immediately. For no heat, boiler breakdown or urgent repairs — post a job free.
Suspected gas leak? Call 0800 111 999 first. Once made safe by National Gas Emergency Service, Gas Safe engineers can carry out any required repair work.
Find an engineer →Total loss of heating in cold weather attended as a priority by Gas Safe engineers across all London boroughs. Same-day response where possible.
Find an engineer →No hot water from your boiler? Gas Safe engineers diagnose and repair the fault — often same day for common causes such as diverter valve failure.
Find an engineer →Boiler showing error codes and refusing to fire? Gas Safe engineers diagnose and repair boiler lockout faults for all major brands.
Find an engineer →Sudden boiler pressure drop can indicate a water leak or pressure relief valve fault. Gas Safe engineers identify and fix the cause.
Find an engineer →Pilot light going out on older boilers is usually a thermocouple or gas valve fault. All pilot light work must be attended by a Gas Safe engineer.
Find an engineer →| Job | Low estimate | High estimate |
|---|---|---|
| Emergency call-out (day) | £100 | £200 |
| Emergency call-out (night/weekend) | £150 | £300 |
| Boiler fault diagnosis | £80 | £150 |
| Minor repair (same visit) | £100 | £250 |
| Major repair | £250 | £400 |
Call-out fees cover attendance only. Repair work, parts, and additional labour charged separately. Always confirm call-out fee before engineer attends.
Describe the emergency — no heating, boiler lockout, error code — and your London postcode. Mark it as urgent. Under 2 minutes.
Gas Safe registered engineers covering your area see your urgent job and contact you directly. Multiple engineers respond simultaneously.
Confirm the call-out fee, Gas Safe registration number, and expected arrival time. Engineer attends and diagnoses the fault.
London's Victorian and Edwardian housing stock means the capital has one of the highest rates of winter boiler breakdown in the UK. Older boilers — particularly those in properties that have not been serviced annually — are most likely to fail during sustained cold spells when they are working hardest. The combination of hard London water, ageing pipework, and older boiler technology means emergency gas call-outs peak sharply between November and February across all London boroughs. Gas Safe engineers covering London are well-equipped to handle the full range of emergency faults, from diverter valve failures causing loss of hot water to PCB faults causing total boiler lockout.
For genuine gas emergencies — any situation where you can smell gas — the National Gas Emergency Service on 0800 111 999 should always be your first call. This service is operated by Cadent Gas and is free to call 24 hours a day, 7 days a week. Their engineers will attend within approximately 1 hour to make the property safe. Once the property has been made safe by the National Gas Emergency Service, you can then engage a Gas Safe registered engineer via GetQuickHelp to carry out any required repair work. Always ensure any engineer you hire has a valid Gas Safe registration — it is a legal requirement for all gas work in the UK.
Post your job free — Gas Safe registered engineers across London respond directly. If you smell gas, call 0800 111 999 first.