**TL;DR: Yes, you need to take action before 28 November 2026, or your electricity bill will go up significantly.**

Here is what is happening:

*   **Your current plan is ending:** Your "Fixed Saver 24" plan ends on 31 December 2026. 
*   **The trap:** If you do nothing, they will automatically move you to a "Standard Variable" tariff. This will jump your rate from **24.6p to 34.1p per kWh** (nearly a 40% increase in your unit rate). 
*   **What you need to do:** Log into your online account or the Fennick Energy app **before 28 November 2026** and select the **"Fixed Saver 27"** tariff to stay on a fixed price. *(Note: Check what the rates are for Fixed Saver 27 when you log in, and maybe compare them with other energy providers just in case you can get a better deal elsewhere).*

*(Ignore the last line of their email that says "There is nothing else you need to do"—that only applies to the updated Terms & Conditions.)*