What happens to my Economy Seven (E7) tariff when I have a smart meter installed?

Your smart meter will have a fixed off-peak 7 hour period from 00:30 to 07:30. This time period takes place according to Coordinated Universal Time (UTC), so during British Summer Time (BST) the 7 hour period will take place between 01:30 and 08:30. This may differ from your existing off-peak period on your current non-smart meter.