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What to do if you smell gas

Call the free 24 hour Gas Emergency Services hotline on 0800 111 999

If you smell gas, think you have a gas leak, or are worried that fumes containing carbon monoxide are escaping from a gas appliance, please call the free Gas Emergency Services emergency line immediately.

You should also:

  • Open all doors and windows to ventilate the property
  • Do not turn on/off any electrical switches
  • Extinguish all naked flames, do not smoke, strike matches or do anything which could 
    cause ignition
  • If there are any electrical security entry phones/locks, please open door manually

Information that you will need to have available when you call National Grid to report a gas leak:

  • The address/location of the suspected gas escape or gas emergency
  • The number of people at the property
  • Where the smell is most noticeable
  • How long the smell has been noticeable
  • Whether any neighbours are affected
  • Your name and phone number
  • Any special circumstances or access information
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