**TLDR: YES, you need to act if you want to avoid a big price hike.**

- **The problem:** Your current deal (Fixed Saver 24, 24.6p/kWh) ends on 31 December 2026.  
- **The deadline:** You must choose a new tariff by **28 November 2026**.  
- **If you do nothing:** You’ll automatically be moved to the Standard Variable tariff at **34.1p/kWh** on 1 January 2027 — that’s a **~39% increase** in your unit rate.  
- **What to do:** Log into your online account/app and select **Fixed Saver 27** before the deadline to lock in a fixed price.  
- **Other changes:** They’re updating Terms & Conditions (meter readings, complaints, email contact) — no action needed on that.

**In short:** Choose the new fixed tariff before 28 Nov 2026, or you’ll pay significantly more.