If you smell gas or suspect a leak at a business, immediately call the National Gas Emergency Service 24/7 on 0800 111 999 (UK).

Evacuate the premises, open doors and windows, turn off the main gas supply if safe to do so, and avoid turning electrical switches on/off or using naked flames. 

Immediate Action Checklist for Businesses:

• Call 0800 111 999: This is the free, 24-hour National Gas Emergency Service number.

• Evacuate: Move all employees and customers away from the building.

• Ventilate: Open doors and windows to allow gas to escape.

• Turn Off Supply: If safe, turn off the gas supply at the meter.

• Do Not: Switch electrical switches, use phones, or light matches/smokes inside.

• Identify Leaks: Watch for rotten egg smells, hissing sounds, dead vegetation, or physical symptoms like nausea/headaches. 

  
  

What Happens Next?

• An emergency engineer will typically arrive within one to two hours.

• The operator will ask for the location, number of people affected, and where the smell is strongest.

• Do not turn the gas back on until a competent, registered engineer has declared it safe.