CMP328: Connections Triggering Distribution Impact Assessment
What is being proposed
Establish the process when any connection triggers a Distribution impact assessment.
Current status
The Panel met on 13 December 2019 and agreed that it goes to a Workgroup. Workgroup meetings were held between 5 August 2020 and 8 September 2021 (note this was de-prioritised by Panel whilst the Modifications to address Ofgem's Targeted Charging Review decision were being progressed). Final Modification Report was sent to Ofgem on 10 November 2021 and Ofgem confirmed at November 2021 Panel that no decision would made on this until they have received the equivalent STC Modification. Final Modification Report was issued to Ofgem 6 April 2022 (Final Modification Report for the associated STC change (CM078) was issued to Ofgem on 7 June 2022). On 14 February 2023, Ofgem sent back the CMP328 Final Modification Report for further work and directed CUSC Panel to revise and resubmit the CMP328 Final Modification Report. February 2023 Panel agreed for the Workgroup to be re-formed to address each of Ofgem's concerns and agreed in principle (following the assessment by the Workgroup) that a Code Administrator Consultation is needed to be run before it is re-presented to Panel for Recommendation Vote). They also agreed to place this as Medium to High in the prioritisation stack. Workgroup to review send-back Terms of Reference TBC. SPEN requested to be the new Proposer for CMP328 following SSE's withdrawal as proposer of the modification on 16 April 2024. Ahead of any future Workgroup meetings the ESO and the new Proposer will work to establish the new timeline to answer the deficiencies within the Sendback letter. Awaiting for CMP434 to process and address legal text to reflect DIA initiated around Gate 2. October 2024 CUSC Panel prioritised as Low, therefore no work will take place on this modification until further notice. The Panel will be reviewing the status of this modification in the January 2025 Panel. Upon receipt of the Authority Open Letter on 31 January: Outlining their approach to prioritisation of electricity transmission network charging modifications, Panel will review the modification status in the February Panel. (18/02/2025) On 14 February 2025 at the Special CUSC Panel the Panel discussed, at length and in detail, the prioritisation of CUSC Modifications. The CUSC Panel agreed this modification remained low priority.
Details
Timeline
Analysis
CMP328 would establish a process for triggering distribution impact assessments when transmission connections affect local networks. The modification has been deprioritised to low status by the CUSC Panel as of February 2025, with work suspended indefinitely. The proposal originated in 2019 but has been repeatedly delayed and sent back by Ofgem for revision.
Why it matters
This illustrates the administrative burden of cross-code coordination — a simple process clarification has been stuck in governance for six years. The deprioritisation suggests the industry views distribution impact coordination as secondary to other connection reforms.
Key facts
- •Modification first raised in 2019
- •Final report sent back by Ofgem in February 2023 for revision
- •Reclassified as low priority February 2025
- •Cross-code with STC CM078 and DCUSA DCP 392
- •Work suspended indefinitely