Complaints

When a person or company has a complaint we follow a standard process. If you are not happy with something, please try to contact the relevant part of the business and they will try to put it right. If you remain dissatisfied please contact us by phone, by email, or in writing.

How to complain (SO)

If your complaint does not relate to an area specified in the electricity and gas contact pages and you are a National Grid SO customer (such as a generator or DNO) please contact us. 

We are available 9am - 4pm, Monday - Friday.

System Operator Improvement Team
National Grid House
Warwick Technology Park
Gallows Hill
Warwick
CV34 6DA

Phone: 01926 654 634
Email: [email protected]

Questions about assets on your land

Questions relating to the location of National Grid’s assets or land policies should be directed to [email protected].