News

⚡ Significant Changes to Non-Commodity Energy Costs

???? Key Takeaways

⚡New Nuclear RAB charge begins November 2025 – higher than expected.
⚡TNUoS charges forecast to rise further from April 2026, possibly exceeding earlier predictions.
⚡Both changes will impact the non-commodity portion of your electricity bill.

???? Nuclear Regulated Asset Base (RAB)

What is it?

⚡A new charge to fund design, build, commissioning, and operation of new nuclear plants.
⚡First project: Sizewell C (Suffolk). Recovered by suppliers via the Supplier Obligation mechanism (same system as Contracts for Difference).

Latest Update:

⚡Government approved a £14.2bn investment in Sizewell C.
⚡Charges confirmed by the Low Carbon Contracts Company:

Period                                         Confirmed/Forecast Rate
1 Nov – 31 Dec 2025                           0.3455 p/kwh
From Jan 2026 (forecast)                     0.393 p/kwh (reviewed quarterly)

Impact on You:

⚡Clients on fully fixed contracts – likely protected.
⚡Clients on pass-through or partially fixed contracts – should expect to see charges from November 2025.

???? Transmission Network Use of System (TNUoS) Charges

Background:

⚡NESO’s draft forecast (early 2025) suggested 25% increases from April 2026.
⚡New indications point to even higher rises – potentially adding costs comparable to Nuclear RAB.

Key Point:

Actual impact will vary depending on location and voltage level.
More details expected in September 2025.

✅ Next Steps

⚡We are liaising with suppliers to confirm how Nuclear RAB and TNUoS charges will be applied.
⚡Managed clients will receive tailored updates once supplier positions are clear.
⚡For now, please prepare for increased non-commodity costs in upcoming contracts.

???? Need Support?

Your Account Manager is available to discuss what these changes mean for your business and how to mitigate impact.