Turn off the main gas valve.
Ventilate the entire property – open all possible windows and doors.
Then call:

Call the police by dialling 101 and file a report.
Inform your insurance company straight away.
In case of damage to the rented property, contact IFAC Service. Also provide us with the reference number of the police report you have filed.

Call the fire brigade by dialling 112 and follow their instructions.
In case of damage to the rented property, contact IFAC Service.
