Gas / suspected leak
Gas smell, suspected escape or carbon monoxide.
Smell gas or suspect carbon monoxide?
Great Britain: call 0800 111 999 immediately. Northern Ireland: call 0800 002 001. Do not wait for your energy supplier. If there is fire, explosion, collapse or immediate danger to life, call 999 as well.
Gas emergencies go straight to the National Gas Emergency Service, not your billing supplier. The tables below show the regional gas networks — all use the same 0800 111 999 emergency line in Great Britain.
Gas networks
| Gas network | Broad area | Emergency / public contact | Website |
|---|---|---|---|
| Cadent | North West, West Midlands, East Midlands, East of England and North London | Emergency: 0800 111 999; enquiries: 0800 389 8000 | cadentgas.com |
| Northern Gas Networks | North Cumbria, North East England and much of Yorkshire | Emergency: 0800 111 999; customer care: 0800 040 7766 | northerngasnetworks.co.uk |
| SGN | Scotland and southern England | Emergency: 0800 111 999; general: 0800 912 1700 | sgn.co.uk |
| Wales & West Utilities | Wales and South West England | Emergency: 0800 111 999; general: 0800 912 2999 | wwutilities.co.uk |
| Northern Ireland gas emergency service | Northern Ireland gas networks | 0800 002 001 | nidirect.gov.uk |
Official sources
All reporting topicsLast verified 28 September 2026