find out more or accept and continue . smell gas worried about gas safety phone the free national gas emergency number on 0800 111 999 . about sgn our services innovation responsibility news roadworks safety publications contact us sgn s scott robinson uses pedal power to boost funds for dementia charityvolunteers help preserve historic south downs landmarksgn talks to royal voluntary service members about gas safety we manage the network that distributes natural and green gas to 5.9 million homes and businesses across scotland and the south of england . whoever your supplier is our pipes deliver gas safely reliably and efficiently to every one of our customers . it s your gas in our network . sgn 2016 legal information