We have a dedicated web advisory team available if you require any assistance while using the online application. Or if you have a question regarding one of the services we offer please contact us:

Telephone number 0870 903 9999 (charged at local rate if calling from a landline, mobile phones may differ, contact your contract provider): 08.00 – 18.00 Mon-Fri (excluding bank holidays)
 
Fax: 0845 366 8911

Email: cos.enquiries@uk.ngrid.com
 
Alternatively write to:

Sales Order Processing
National Grid
PO Box 5516
Wolverhampton
WV1 9NZ 

If you smell gas or are worried about gas safety in Britain, call our free 24 hour helpline on 0800 111 999. (Calls are recorded and may be monitored).