If you do not have a username, please enter your e-mail address and then tell us if you have a password. Why? If you would like to change the e-mail address you use to sign in, use your old e-mail address now and then update it in your National Grid profile.

When checked, the 'Remember me' option saves and prefills your sign-in information for the next time you come to this screen on the same computer. This is a great way to sign in faster, but for privacy and security reasons we recommend you check this option only on a private computer.