CM093: Extending the principles of the User Commitment Methodology to Final Sums Methodology as a consequence of CUSC Modification – CMP417
What is being proposed
This modification seeks to deliver the required changes to the STC as a consequence of CMP417 , which proposes to extend some of the principles of CUSC section 15 “User Commitment Methodology” to Users on Final Sums methodology.
Current status
08/01/2023 Panel met on 13 December 2023 and agreed the Modification will procced to Workgroup. Nominations have completd and the 1st Workgroup will take place Next Workgroup 29 February 2024, Next Workgroup 13 March 2024, Next Worgroup to be re-arranged, date to be confirmed, Workgroup 2 due to take place on 5 May 2024, The timeline has been updated, next WG now due 6 June 2024, Awaiting next steps re CUSC modification (CMP417), Awaiting next steps re CUSC modification (CMP417),No further update at the moment, No new update. 07/07/2025: CMP417 Workgroups re-commenced in May 2025. An updated timeline will be preseted to the STC Panel. 30/09/2025 Still awaiting updated timeline to be presented to STC Panel. 29/10/2025 The Panel approved the new timeline as submitted within the Panel Papers.
Details
Timeline
Analysis
NESO proposes STC modification CM093 to extend User Commitment Methodology principles from transmission connection charges to Final Sums methodology users, following CUSC modification CMP417. The modification affects NESO and Transmission Owners, proceeding through standard governance with workgroups restarting in May 2025 after extended delays. This is a consequential change to align charging methodologies across different user categories.
Why it matters
This creates consistency between charging approaches but does not fundamentally alter cost allocation mechanisms — it extends existing principles rather than reforming them. The extended timeline suggests complexity in aligning cross-code charging methodologies without clear economic justification for the different treatment of user categories.
Key facts
- •Consequential modification following CMP417
- •Workgroups restarted May 2025 after delays
- •Affects NESO and Transmission Owners
- •Standard governance route through workgroup process