Elexon confirms P518 approved as Self-Governance Modification, implementation set for 5 November 2026

Following the closed Report Phase Consultation (18 Aug–1 Sep 2026, one confidential response, in support), the Draft Modification Report was presented to the BSC Panel on 10 September 2026, which approved P518 as a Self-Governance Modification. No objections were received during the Self-Governance objection window, finalising the Panel's approval. P518 has now moved to 'Awaiting Implementation' status, with implementation scheduled for 5 November 2026.

The approval and fixed implementation date mean the BSCCo-to-NESO data provision obligation for CLASS ABSVD calculation is now locked in, removing uncertainty about whether and when this enabling data infrastructure will exist. This clears a procedural prerequisite for NESO's C9 arrangements to become operational for DNO-activated CLASS services, though the substantive ABSVD methodology itself remains dependent on the separate, still-unresolved C9 process.

The rapid, uncontested progression through Self-Governance (single supportive response, no objections) confirms the market's prior framing of P518 as a narrow, low-controversy enabling change rather than a substantive policy shift. The near one-month gap between Panel approval (10 September) and implementation (5 November) appears to reflect standard BSC implementation lead time rather than any additional review step. Market design significance remains contingent on NESO's parallel C9 process, since this modification only guarantees data availability, not how that data will be used to value or dispatch CLASS activations; stakeholders tracking ABSVD-for-CLASS impacts should now shift primary attention to C9 methodology developments rather than further BSC procedural steps.

Balancing and Settlement Code (BSC), Section V5

P518 implementation (data provision obligation goes live) · 5 Nov 2026

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