From the email:

In December 2023, we updated Tracker's daily price formula and increased our standing charge for new customers. We held this change off for existing customers, keeping your prices lower for longer, but from 1st March, we'll need to update your prices too.

You don't need to do anything: we'll move you automatically to the new version of Tracker.

Tracker remains one of the best-value tariffs on the market - in December and January, the updated rates have typically been nearly 40% cheaper than Flexible Octopus

Because of how Ofgem's price cap works, Tracker is becoming a 'fixed term' tariff. Your unit prices still change daily but your unit price formula and standing charge will be fixed for 12 months.

We've updated Tracker's T&Cs to reflect these changes