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Electricity Capacity Market Reform

Lifecycle: Response Published Department for Business, Energy & Industrial Strategy · Department for Energy Security and Net Zero Last regenerated 4 days ago

Summary

What this is

The UK Electricity Capacity Market Reform is a programme led by the Department for Energy Security and Net Zero to update the Capacity Market (CM) rules, integrate low-carbon and emerging technologies (including hydrogen-to-power and clean flexibility), enhance delivery assurance, and make locational changes to Capacity Market Units ahead of Prequalification 2026.

Why it matters

The Capacity Market is the UK's primary mechanism for ensuring electricity security of supply by contracting capacity providers to be available at times of system stress; reforming it to accommodate low-carbon technologies is critical to meeting net-zero targets while maintaining grid reliability.

Current status

Outcomes have been published for both the 'Prequalification 2026' consultation and the 'low carbon technologies and delivery assurance' consultation (both February 2026), with regulatory changes being implemented through the Electricity Capacity (Amendment) Regulations 2025.

What changed recently

  • 16 Feb 2026 — Outcome published for 'Capacity Market: proposals to integrate low carbon technologies and enhance delivery assurance ahead of Prequalification 2026' consultation. →
  • 16 Feb 2026 — Outcome published for 'Capacity Market: proposed changes for Prequalification 2026' consultation. →
  • 8 Jan 2026 — Consultation on low carbon technologies and delivery assurance closed after running since December 2025. →
  • 2 Dec 2025 — Consultation opened on proposals to integrate low carbon technologies and enhance delivery assurance ahead of Prequalification 2026. →
  • 21 Nov 2025 — Government response published to open letter on new technologies in the Capacity Market 2025. →

Key documents

Consultations

Stakeholders

Grouped by role with evidence. Long groups scroll inside their column.

Sponsoring department 2

  • Department for Energy Security and Net Zero (DESNZ) → src
    Lead department responsible for Capacity Market policy and reform, formerly BEIS. Leads all consultations and publishes outcomes on this thread.
  • Department for Business, Energy & Industrial Strategy (BEIS) → src
    Former responsible body for Capacity Market policy prior to machinery of government changes creating DESNZ.

Regulator / delivery programme 2

  • National Grid Electricity System Operator (NGESO) / National Energy System Operator (NESO) ↗
    Delivery Authority for the Capacity Market, responsible for running prequalification, auctions, and compliance monitoring under the CM Rules.
  • Ofgem ↗
    Economic regulator with oversight role in Capacity Market; approves certain rule changes and monitors market outcomes.

Political commitments

What parties and ministers have promised — manifesto pledges, King's Speech announcements, ministerial statements. Each card shows what was said, by whom, and when, with a link to the original source.

Open questions & gaps

Known gaps in the evidence base and what's still pending.

Pending in the lifecycle

  • Implementation of the Electricity Capacity (Amendment) Regulations 2025 — the statutory instrument giving effect to the PQ 2026 rule changes has been referenced but its full parliamentary progress and commencement are not confirmed in the event list.
  • The 'clean flexibility' consultation referenced in the thread summary (pk=38697, opened June 2025) does not yet have a closed or outcome event — its outcome is pending.
  • Prequalification 2026 auction timetable and results — the downstream auction outcomes following the PQ 2026 rule changes are not yet published.

Beyond the corpus

  • MISSING Electricity Capacity (Amendment) Regulations 2025 — the SI itself — The short summary references this SI as implementing the reform changes, but no event in the list corresponds to its laying or making before Parliament.
  • MISSING Impact Assessment for PQ 2026 rule changes — Major CM rule changes of this scale would normally be accompanied by a published impact assessment; none appears in the event list.
  • MISSING Outcome for 'Capacity Market: proposals to modernise Rules and improve participation and delivery assurance of consumer-led flexibility' — June 2025 HTML version (pk=38697) — A consultation_open event exists for June 2025 but no corresponding consultation_closed or separate outcome event is listed, suggesting the consultation may still be open or its closure has not been captured.

Confidence gaps

  • The exact scope and content of the Electricity Capacity (Amendment) Regulations 2025 cannot be verified from the event list alone; the SI reference appears only in the thread summary metadata.
  • Ministerial names responsible for signing off CM reform decisions are not grounded in the event list and have been omitted; the relevant minister at DESNZ is not confirmed from these events.
  • The relationship between the June 2025 'consumer-led flexibility' consultation (pk=38697) and the December 2024 consultation (pk=31522) on the same topic is unclear — it is uncertain whether pk=38697 is a re-opened or separate follow-on consultation.