Call the Gas Emergency Services on 0800 111 999.
Turn off your gas supply at the mains if you can.
- Open doors and windows to let gas out and fresh air in.
- Don't switch anything electrical on or off.
- Put out all naked flames. Don't smoke, strike matches or do anything which could make the gas catch fire.
- If you have any electrical security entry phones or locks, don't use them. Open your doors manually.