Minded-to Decision on CMP444: Introducing a cap and floor to wider generation TNUoS charges

Details of outcome

In July 2025, we consulted on our minded-to decision to reject Connection and Use of System Code (CUSC) CMP444: Introducing a cap and floor to wider generation TNUoS charges. The proposal aimed to place upper and lower limits on the absolute £/kW Peak, Year-Round Shared and Year-Round Not Shared Wider tariffs. 

We received a total of 25 responses to our consultation, including four confidential responses. Those views were taken into consideration in our Final Decision, alongside the Final Modification Report (FMR). 

Consistent with our minded-to decision, we remain of the view that none of the modification proposals would better facilitate achievement of the ACOs, and that all of the proposals should therefore be rejected. Our final decision is to direct that the modification CMP444 not be made.

Read the full outcome

Original consultation

Consultation description

We are consulting on our minded-to decision to reject Connection and Use of System Code (CUSC) Modification Proposal CMP444: Introducing a cap and floor to wider generation TNUoS charges.

Next steps

This consultation will close (deadline for responses) at 5pm on 11 August 2025. Following this consultation closing, we will review responses and publish a final decision on CMP444. 

How to respond 

We particularly welcome responses from parties affected by these proposals, including Transmission Network Use of System (TNUoS)-liable generators, suppliers, consumer representatives, and the National Energy System Operator (NESO). We also welcome responses from other interested stakeholders and the public. Responses should be sent via email to tnuosreform@ofgem.gov.uk.