Authority update on decision timing for CMP444: Introducing a cap and floor to wider generation TNUoS charges
Reports, plans and updates
- Publication date
- Industry sector
- Transmission Network
The CMP444 Final Modification Report presented to us 28 March 2025 consisted of an Original Proposal and seven alternative solutions. These solutions are complex in nature, and as part of the industry governance process we have received a wide range of representations from various industry stakeholders. For these reasons, we have decided to delay our original timetable for making a decision on this code modification. We now expect to publish a minded-to decision in late June to early July 2025.
We believe that deferring our decision is appropriate, as it will allow sufficient time to consider the evidence in full, understand any wider market impacts, and will ensure a carefully balanced assessment of all options that have been presented to us by industry.
Previously, we also indicated that we intended to make a decision on both CMP444 and CMP432[1] (improve “Locational Onshore Security Factor” for TNUoS Wider Tariffs) in a manner which ensured that, if CMP432 were to be approved, its effect on transmission charges can inform considerations of the cap and floor ahead of our final decision. In the context of the updated CMP444 timelines there will be an impact on the timing of the CMP432 decision also.
The National Energy System Operator (NESO) Code Administrator will also be communicating this update on our intended timelines with industry.
Seeking industry action to mitigate the investment impacts of very high projected TNUoS charges
30 September 2024
This open letter is our response to the developing uncertainty around long-term Transmission Network Use of System (TNUoS) charges, particularly concerns driven by last year’s National Grid Electricity System Operator (NGESO) 10-year projections of significant charge increases. We outline the challenges this could bring to investment decisions and consumers, and encourage NGESO to raise a code modification proposal (CMP) that aligns with the views provided in this letter, to be brought to the CUSC Panel in October 2024.