**TL;DR: Yes—if you want to avoid being moved onto a pricier variable tariff.**

- **By 28 November 2026:** choose a new tariff via your online account/app. They suggest **Fixed Saver 27** if you want to stay on a fixed price.
- **If you do nothing:** you’ll be moved to **Standard Variable**, currently **34.1p/kWh + 61.2p/day standing charge**. Your current unit rate is **24.6p/kWh**, so the variable unit rate is about **39% higher**.
- The letter doesn’t state Fixed Saver 27’s price, so **compare tariffs before choosing**.
- The other terms-and-conditions changes require **no action**.