Turn off the gas supply at the meter emergency control valve. We can advise you where to find this if you do not know. Back to top Put out any naked flames. Back to top Open windows Back to top Do not switch on anything electrical including using light switches. Back to top Do not smoke. Back to top Call the gas emergency helpline - 0800 111 999. Back to top Did this solve your issue? Yes No Contact us How could we improve this page??