EUROPE · MARKET DESIGN

United Kingdom

How the electricity market is organised in United Kingdom: the operators and regulator, the markets that apply here, and the developments changing them.

Markets that apply

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The pan-European market architecture that clears United Kingdom.

Developments

20 tracked developments touching United Kingdom.

06 NOV 2026

NESO raises STC modification PM0124 to revise Expansion Constant & Expansion Factor data requirements following CMP315/CMP375

Regulatory review · ENERGY MARKETS · GB

06 NOV 2026

CMP276 proposes replacing TNUoS demand residual Triad charge with two new socialised demand charges

Regulatory review · ENERGY MARKETS · GB

06 NOV 2026

Elexon opens CP1653 consultation to cut MSID Pair Allocation lead time from five to one working day

Consultation · FLEXIBILITY MARKETS · Great Britain

04 NOV 2026

P502 Timetable Firms Up: Elexon Specifies January 2027 Assessment Procedure Consultation Window

Regulatory review · BALANCING MARKETS · Great Britain

04 NOV 2026

P412 Workgroup Meeting 7 Confirmed Held on 29 October 2026; All Downstream Dates Still TBC

Regulatory review · BALANCING MARKETS · Great Britain

29 OCT 2026

Zenobe Energy submits BSC Modification P522 to introduce subsidy-adjusted Shadow Bid Price for Balancing Mechanism transparency

Regulatory review · BALANCING MARKETS · Great Britain

29 OCT 2026

BSC Modification P462: GB industry Workgroup advances proposal to strip subsidy distortion from Balancing Mechanism Bid Prices via BSC Section T amendment

Regulatory review · BALANCING MARKETS · Great Britain

28 OCT 2026

BSC Modification P493 advances through Workgroup assessment to improve Transmission Loss Factor transparency and forecasting

Regulatory review · BALANCING MARKETS · Great Britain

23 OCT 2026

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

Implementation · BALANCING MARKETS · Great Britain

23 OCT 2026

NESO Advances Demand for Constraints (DfC) Long-Term Constraint Management Service Toward 2027 Procurement

Implementation · FLEXIBILITY MARKETS · GB (Scotland - B2, B4, B5, B6 boundaries)

22 OCT 2026

NESO Redirects South West Reactive Power Needs to New Mid-term Reactive Power Market

Go-live · BALANCING MARKETS · GB

20 OCT 2026

NESO's Constraints Collaboration Project advances GB constraint-management reforms: DFS constraint capability live, Storage Behind Constraints consultation roadmap set, gas pre-gate CMM rejected, CMIS intertrip extensions tendering

Implementation · FLEXIBILITY MARKETS · GB

16 OCT 2026

NESO proposes CMP457 to overhaul ORPS reactive power compensation methodology under CUSC

Proposal · BALANCING MARKETS · GB

15 OCT 2026

P462 Adds CEPA Cost-Benefit Analysis Phase-Two Addendum, Timetable Still Unchanged Ahead of November-December 2026 Consultation

Regulatory review · BALANCING MARKETS · Great Britain

15 OCT 2026

P502 Assessment Procedure Consultation Slips Four Months to January 2027 (TBC), Delaying GB Supplier-Aggregator Compensation Timeline

Regulatory review · BALANCING MARKETS · Great Britain

13 OCT 2026

Ofgem extends NESO's C1.17 derogation on NTC restrictions to 2030, mandates fresh reviews of NTC Calculation Policy and Commercial Compensation Methodology by 2027

Decision · ENERGY MARKETS · GB

09 OCT 2026

Elexon's BSC Modification P510 advances through Assessment Procedure to replace mutualised VTP compensation with direct bidirectional mechanism in GB Wholesale Market

Regulatory review · ENERGY MARKETS · Great Britain

01 OCT 2026

BSC Modification P522 Proposes Subsidy-Adjusted Shadow Bid Price for GB Balancing Mechanism Transparency

Proposal · BALANCING MARKETS · Great Britain

01 OCT 2026

Elexon's BSC Modification P441 creating six Complex Site metering classes submitted to Ofgem for decision

Regulatory review · BALANCING MARKETS · Great Britain

30 SEPT 2026

NESO's Q3 2026 Update Advances Demand-Side Flexibility Routes-to-Market Barrier Removal Programme

Implementation · FLEXIBILITY MARKETS · Great Britain