GC0186: Proposed Grid Code Changes - Post Electricity System Restoration Standard (ESRS)
What is being proposed
The purpose of this modification is to update the Grid Code in respect of the restoration requirements following the implementation of GC0156, in particular (but not limited to) the introduction of ’Regional Restoration Plans’, the equitable treatment of National Grid Electricity Transmission, Scottish Power Transmission and Scottish Hydro-Electric Transmission Limited during a restoration, the ability for Network Operators to switch at sufficient speed, clarifications / improvements in testing / data requirements and correction of known errors.
Current status
09/03/2026: The Proposal was presented at the February Panel where it was unanimously agreed that GC0186 should follow the Standard Governance route and proceed to a Workgroup. The Panel agreed by majority the Terms of Reference for the Workgroup.
Details
Timeline
Analysis
NESO proposes Grid Code changes to implement 'Regional Restoration Plans' following the previous GC0156 modification, standardising how transmission operators coordinate during system blackout recovery. The proposal affects all transmission system operators, transmission owners, network operators and generators, requiring workgroup development under standard governance. Cross-code impacts extend to STC and DCODE.
Why it matters
This codifies operational coordination mechanisms rather than changing economic incentives — it administers restoration processes rather than pricing them. The 'equitable treatment' language suggests incumbent transmission operators negotiated their respective roles during system recovery, potentially reflecting turf battles over restoration responsibilities.
Key facts
- •Regional Restoration Plans introduced
- •Affects NGET, SPT, and SHET equally
- •Standard governance route approved
- •Cross-code impact on STC and DCODE