TRACK · IMPLEMENTATION CALENDAR
Implementation Calendar
Every dated milestone ahead across tracked electricity market-design developments — consultations, regulatory decisions, implementation deadlines and go-lives. Each row opens the full change map.
115 milestones · 1 year
| Date | Change | Market | Geography | Who is affected |
|---|---|---|---|---|
| November 2026 | ||||
| 9 Nov 2026 | Consultation deadline
ARERA consults on final orientations for dispatch service, simplified energy pricing and DSO storage in Italy's non-interconnected island systems (341/2026/R/eel) |
Balancing · MULTI-TIMEFRAME | Italy | Balance Responsible Parties (BRP), Local DSOs (e.g. e-distribuzione, local distributors) +7 |
| 10 Nov 2026 | Milestone
BNetzA Announces Results of Germany's First Long-Term Capacity Auction Under StromVKG |
Capacity · N/A | Germany | power plant operators, battery storage operators +3 |
| 11 Nov 2026 | Consultation deadline
Italy North IDCC methodology consultation proceeds unchanged, confirming Jan 2028 Central Europe DA alignment driver |
Balancing · INTRADAY | Italy | TSOs (Italy North CCR), Italy North D-2&ID Project Team +2 |
| 11 Nov 2026 | Milestone
Zenobe Energy submits BSC Modification P522 to introduce subsidy-adjusted Shadow Bid Price for Balancing Mechanism transparency |
Balancing · REAL-TIME | United Kingdom | Balancing Mechanism Units (BMUs), Subsidised generators +3 |
| 11 Nov 2026 | Review
BSC Modification P462: GB industry Workgroup advances proposal to strip subsidy distortion from Balancing Mechanism Bid Prices via BSC Section T amendment |
Balancing · REAL-TIME | United Kingdom | Balancing Mechanism Participants, NGESO (System Operator) +3 |
| 11 Nov 2026 | Go-live
JAO Confirms UA-SK Intraday Auction Platform Live, Publishes Final Bidding Timeline Ahead of 11 November First Auction |
Energy · INTRADAY | Slovakia | Market participants trading on the UA-SK border, JAO (allocation platform) +5 |
| 12 Nov 2026 | Review
NESO's BSC Modification P502 moves through Assessment Procedure to create Supplier/Aggregator compensation mechanism for ABSVD-driven imbalance adjustments |
Balancing · REAL-TIME | United Kingdom | Suppliers, Independent Aggregators +3 |
| 12 Nov 2026 | Review
Elexon's Dedicated P521 Tracking Page Confirms Full Report Phase Timetable, Resolving Prior Ambiguity on Panel/Authority Dates |
Balancing · N/A | United Kingdom | Licensed Generators, Route-to-market providers +3 |
| 12 Nov 2026 | Consultation deadline
Core CCR 4th Amendment Fallback Consultation Confirmed, No New Developments |
Energy · DAY-AHEAD | Belgium, France, Germany, Ireland, Netherlands, Poland, Austria, Czechia, Slovakia, Hungary, Romania, Slovenia, Croatia, Europe-wide / cross-border | Core CCR TSOs (50Hertz, Amprion, APG, Creos, ČEPS, EirGrid, ELES, Elia, HOPS, MAVIR, PSE, RTE, SEPS, TenneT GmbH, TenneT BV, Transelectrica, TransnetBW), independent Transmission Capacity Provider (iTCP) +3 |
| 12 Nov 2026 | Go-live
JAO Confirms UA-SK Intraday Auction Platform Live, Publishes Final Bidding Timeline Ahead of 11 November First Auction |
Energy · INTRADAY | Slovakia | Market participants trading on the UA-SK border, JAO (allocation platform) +5 |
| 13 Nov 2026 | Regulatory decision
Elexon's Dedicated P521 Tracking Page Confirms Full Report Phase Timetable, Resolving Prior Ambiguity on Panel/Authority Dates |
Balancing · N/A | United Kingdom | Licensed Generators, Route-to-market providers +3 |
| 16 Nov 2026 | Consultation deadline
European Commission opens feedback on draft decision approving Sweden's unilateral ETS extension to pulp, paper and board installations |
Carbon · N/A | Europe-wide / cross-border | Sweden (Member State), Pulp, paper and board installation operators +2 |
| 16 Nov 2026 | Go-live
MCCG webinar details SDAC/SIDC operational progress: XBID 5.0 corrective measures, 15-min MTU one-year review, fallback robustness workstreams, storage orders consultation outcomes, and IT architecture assessment |
Energy · MULTI-TIMEFRAME | Europe-wide / cross-border | NEMOs, TSOs +5 |
| 17 Nov 2026 | Go-live
RTE launches first daily mFRR upward balancing-capacity auction under new RR-RC V6 rules |
Balancing · DAY-AHEAD | France | Balancing service providers (Acteurs d'Ajustement), Aggregators +4 |
| 18 Nov 2026 | Go-live
JAO publishes NRA-approved 4th amendment to CCR Core Regional Specific Annex of the HAR, adding SEM-FR border and HVDC return rules ahead of 18 Nov 2026 entry into force |
Energy · FORWARD | Italy, Europe-wide / cross-border | TSOs, JAO (single allocation platform) +3 |
| 18 Nov 2026 | Consultation deadline
Italy North TSOs confirm LTCC methodology consultation timeline and publish supporting documents |
Energy · FORWARD | Italy | Italy North TSOs, Market participants trading cross-border long-term capacity +2 |
| 20 Nov 2026 | Consultation deadline
Elexon opens CP1653 consultation to cut MSID Pair Allocation lead time from five to one working day |
Flexibility · N/A | United Kingdom | Supplier Volume Allocation Agents, BSC Systems providers +3 |
| 24 Nov 2026 | Implementation deadline
Nordic TSOs set 24 November 2026 for removal of indivisible-bid attribute in aFRR and mFRR capacity markets |
Balancing · MULTI-TIMEFRAME | Denmark, Finland, Norway, Sweden | Balancing Service Providers (BSPs), Nordic TSOs (Statnett, Svenska kraftnät, Energinet, Fingrid) +2 |
| 24 Nov 2026 | Implementation deadline
Nordic TSOs to remove 'Indivisible Bids Allowed' attribute, make Minimum Quantity mandatory in aFRR/mFRR capacity markets from 24 November 2026 |
Balancing · N/A | Denmark, Finland, Norway, Sweden | Balancing Service Providers (BSPs), Nordic TSOs |
| 24 Nov 2026 | Auction
ARERA's Delibera 332/2026/R/eel reconfirmed: €27,000/MWh/year price cap for Italy's second MACSE battery auction (24 Nov 2026) |
Capacity · FORWARD | Italy | Battery storage developers/investors, Terna (TSO) +1 |
| 25 Nov 2026 | Go-live
Nordic TSOs set 24 November 2026 for removal of indivisible-bid attribute in aFRR and mFRR capacity markets |
Balancing · MULTI-TIMEFRAME | Denmark, Finland, Norway, Sweden | Balancing Service Providers (BSPs), Nordic TSOs (Statnett, Svenska kraftnät, Energinet, Fingrid) +2 |
| 25 Nov 2026 | Go-live
Nordic TSOs to remove 'Indivisible Bids Allowed' attribute, make Minimum Quantity mandatory in aFRR/mFRR capacity markets from 24 November 2026 |
Balancing · N/A | Denmark, Finland, Norway, Sweden | Balancing Service Providers (BSPs), Nordic TSOs |
| 25 Nov 2026 | Milestone
MCCG webinar details SDAC/SIDC operational progress: XBID 5.0 corrective measures, 15-min MTU one-year review, fallback robustness workstreams, storage orders consultation outcomes, and IT architecture assessment |
Energy · MULTI-TIMEFRAME | Europe-wide / cross-border | NEMOs, TSOs +5 |
| 25 Nov 2026 | Go-live
ARERA Approves Digital-Certificate Access for PCE Platform and Updated Terna–GME Convention Ahead of MARI Connection |
Balancing · MULTI-TIMEFRAME | Italy | Terna (TSO), GME (Gestore dei Mercati Energetici / NEMO) +3 |
| 30 Nov 2026 | Implementation deadline
CRE issues companion favorable opinion (Deliberation 2026-177) detailing acompte invoicing calendar for France's capacity-mechanism cost-allocation tax |
Capacity · N/A | France | RTE, Enedis +2 |
| 30 Nov 2026 | Milestone
ARERA approves new weighted-combination algorithm for estimating BRP consumption-side exposure under Italy's dispatch Guarantees Regulation |
Balancing · REAL-TIME | Italy | Balance Responsible Parties (BRP), Balancing Service Providers (BSP) +2 |
| December 2026 | ||||
| 1 Dec 2026 | Implementation deadline
ARERA adopts deliberation 336/2026/R/eel confirming safeguard-service tender rules and TIV amendments for Italy's 2027-2028 biennium |
Energy · N/A | Italy | Safeguard service suppliers (esercenti la salvaguardia), Final customers without a free-market supplier +4 |
| 1 Dec 2026 | Implementation deadline
PSE Publishes WIRE Technical Standards v14.1 Integrating Polish Balancing Market with European mFRR Platform and Standardizing Non-Market Redispatch Settlement |
Balancing · REAL-TIME | Poland | Balancing Service Providers, Market Operators +3 |
| 1 Dec 2026 | Milestone
CNMC issues advisory report on first auction convening specific remuneration regime for high-efficiency cogeneration in Spain |
Capacity · N/A | Spain | High-efficiency cogeneration plant operators (gas), Biomass cogeneration operators +5 |
| 2 Dec 2026 | Milestone
CNMC issues advisory report on first auction convening specific remuneration regime for high-efficiency cogeneration in Spain |
Capacity · N/A | Spain | High-efficiency cogeneration plant operators (gas), Biomass cogeneration operators +5 |
| 4 Dec 2026 | Milestone
CNMC issues advisory report on first auction convening specific remuneration regime for high-efficiency cogeneration in Spain |
Capacity · N/A | Spain | High-efficiency cogeneration plant operators (gas), Biomass cogeneration operators +5 |
| 6 Dec 2026 | Consultation deadline
PSE launches public consultation on draft Amendment 7/2026 to Balancing Conditions (WDB) |
Balancing · REAL-TIME | Poland | Balance Responsible Parties, Balancing service providers +2 |
| 9 Dec 2026 | Consultation deadline
BSC Modification P462: Removal of CfD/RO Subsidy Distortion from Balancing Mechanism Bid Prices Advances Through Assessment Procedure |
Balancing · REAL-TIME | United Kingdom | BSC Parties, Balancing Mechanism Units +4 |
| 9 Dec 2026 | Consultation deadline
Elexon confirms P462 Workgroup meeting 18 held and full Assessment Procedure timetable through May 2027 unchanged |
Balancing · REAL-TIME | United Kingdom | National Grid ESO (Proposer), Generators receiving CfD support +4 |
| 9 Dec 2026 | Auction
RTE and Terna announce preliminary Y+1 and Y+2 auctions for FR-IT yearly Long-Term Transmission Rights (Business Years 2027-2028) |
Energy · FORWARD | FR-IT border interconnector | Market participants trading FR-IT cross-border capacity, RTE +2 |
| 9 Dec 2026 | Auction
Swissgrid and Terna Launch CH-IT Annual LTTR Auctions for 2027 and 2028 via JAO |
Energy · FORWARD | CH-IT border interconnector | Swissgrid, Terna +2 |
| 9 Dec 2026 | Consultation deadline
BSC Modification P522 Proposes Subsidy-Adjusted Shadow Bid Price for GB Balancing Mechanism Transparency |
Balancing · REAL-TIME | United Kingdom | BMU operators/generators receiving subsidies, NESO (system operator) +3 |
| 9 Dec 2026 | Consultation deadline
P462 Adds CEPA Cost-Benefit Analysis Phase-Two Addendum, Timetable Still Unchanged Ahead of November-December 2026 Consultation |
Balancing · REAL-TIME | United Kingdom | CfD-supported generators, RO-supported generators +6 |
| 9 Dec 2026 | Milestone
CNMC issues advisory report on first auction convening specific remuneration regime for high-efficiency cogeneration in Spain |
Capacity · N/A | Spain | High-efficiency cogeneration plant operators (gas), Biomass cogeneration operators +5 |
| 10 Dec 2026 | Auction
CNMC issues advisory report on first auction convening specific remuneration regime for high-efficiency cogeneration in Spain |
Capacity · N/A | Spain | High-efficiency cogeneration plant operators (gas), Biomass cogeneration operators +5 |
| 15 Dec 2026 | Go-live
URE Approves Changes No. 5/2026 to Poland's Balancing Conditions (WDB), Effective 15 December 2026 |
Balancing · REAL-TIME | Poland | PSE (TSO), Balance Responsible Parties +1 |
| 16 Dec 2026 | Auction
Swissgrid and Terna Launch CH-IT Annual LTTR Auctions for 2027 and 2028 via JAO |
Energy · FORWARD | CH-IT border interconnector | Swissgrid, Terna +2 |
| 18 Dec 2026 | Consultation deadline
NESO's BSC Modification P502 moves through Assessment Procedure to create Supplier/Aggregator compensation mechanism for ABSVD-driven imbalance adjustments |
Balancing · REAL-TIME | United Kingdom | Suppliers, Independent Aggregators +3 |
| 31 Dec 2026 | Milestone
TenneT files long-term-solution report under 2026 loop-flow derogation, flags need for 2027 derogation |
Energy · DAY-AHEAD | Netherlands, Europe-wide / cross-border | TSOs (TenneT), National regulatory authorities (ACM) +5 |
| January 2027 | ||||
| 1 Jan 2027 | Go-live
BNetzA amends EE grid-cost allocation methodology to refine estimation of renewable capacity in third-party downstream networks |
Energy · N/A | Germany | Distribution network operators (Verteilnetzbetreiber), Transmission system operators (Übertragungsnetzbetreiber) +3 |
| 1 Jan 2027 | Implementation deadline
JAO document reveals fuller NSL rulebook: implicit GB-NO2 short-term coupling detailed alongside explicit long-term FTR-Option auctions, plus 2027 CBAM flow-tariff provision |
Capacity · MULTI-TIMEFRAME | Norway, United Kingdom | National Grid NSL Limited (NGNSL), Statnett +5 |
| 1 Jan 2027 | Implementation deadline
ARERA adopts deliberation 336/2026/R/eel confirming safeguard-service tender rules and TIV amendments for Italy's 2027-2028 biennium |
Energy · N/A | Italy | Safeguard service suppliers (esercenti la salvaguardia), Final customers without a free-market supplier +4 |
| 1 Jan 2027 | Go-live
ARERA adopts deliberation 336/2026/R/eel confirming safeguard-service tender rules and TIV amendments for Italy's 2027-2028 biennium |
Energy · N/A | Italy | Safeguard service suppliers (esercenti la salvaguardia), Final customers without a free-market supplier +4 |
| 1 Jan 2027 | Go-live
BNetzA publishes full Festlegungsentwurf text (BK8-26-001-A): detailed Tenor and Gründe confirm phased revenue-cap treatment, 2028 self-retention start, scope carve-outs and elimination of individual cost-proof |
Balancing · MULTI-TIMEFRAME | Germany | distribution system operators, balance responsible parties +5 |
| 1 Jan 2027 | Milestone
ARERA Opens Proceeding to Integrate EV Charging Infrastructure with Grid via Chain 2 Channel and CIR Certification |
Flexibility · N/A | Italy | Distribution system operators (DSOs), EV charging infrastructure operators/service providers +4 |
| 1 Jan 2027 | Milestone
JAO publishes NRA-approved 4th amendment to CCR Core Regional Specific Annex of the HAR, adding SEM-FR border and HVDC return rules ahead of 18 Nov 2026 entry into force |
Energy · FORWARD | Italy, Europe-wide / cross-border | TSOs, JAO (single allocation platform) +3 |
| 1 Jan 2027 | Go-live
URE sets 2027 Polish RES surcharge (opłata OZE) at 6.40 zł/MWh, down 0.90 zł/MWh |
Energy · N/A | Poland | Electricity consumers, RES generators receiving support +3 |
| 7 Jan 2027 | Auction
Commission publishes revised 2026 and 2027 EU ETS1 auction calendars with 190.5 million allowances entering the MSR |
Carbon · MULTI-TIMEFRAME | Ireland, United Kingdom, Europe-wide / cross-border | Power generators, Industrial installations +6 |
| 7 Jan 2027 | Go-live
European Commission publishes revised 2027 EU ETS1 and first-ever 2027 EU ETS2 auction calendars |
Carbon · N/A | Europe-wide / cross-border | ETS1 regulated installations, ETS2 regulated entities (fuel suppliers for buildings/transport) +4 |
| 8 Jan 2027 | Auction
Commission publishes revised 2026 and 2027 EU ETS1 auction calendars with 190.5 million allowances entering the MSR |
Carbon · MULTI-TIMEFRAME | Ireland, United Kingdom, Europe-wide / cross-border | Power generators, Industrial installations +6 |
| 13 Jan 2027 | Auction
Commission publishes revised 2026 and 2027 EU ETS1 auction calendars with 190.5 million allowances entering the MSR |
Carbon · MULTI-TIMEFRAME | Ireland, United Kingdom, Europe-wide / cross-border | Power generators, Industrial installations +6 |
| 15 Jan 2027 | Review
NESO's BSC Modification P502 moves through Assessment Procedure to create Supplier/Aggregator compensation mechanism for ABSVD-driven imbalance adjustments |
Balancing · REAL-TIME | United Kingdom | Suppliers, Independent Aggregators +3 |
| 15 Jan 2027 | Consultation deadline
Zenobe Energy submits BSC Modification P522 to introduce subsidy-adjusted Shadow Bid Price for Balancing Mechanism transparency |
Balancing · REAL-TIME | United Kingdom | Balancing Mechanism Units (BMUs), Subsidised generators +3 |
| 15 Jan 2027 | Consultation deadline
BSC Modification P462: GB industry Workgroup advances proposal to strip subsidy distortion from Balancing Mechanism Bid Prices via BSC Section T amendment |
Balancing · REAL-TIME | United Kingdom | Balancing Mechanism Participants, NGESO (System Operator) +3 |
| 18 Jan 2027 | Go-live
European Commission publishes revised 2027 EU ETS1 and first-ever 2027 EU ETS2 auction calendars |
Carbon · N/A | Europe-wide / cross-border | ETS1 regulated installations, ETS2 regulated entities (fuel suppliers for buildings/transport) +4 |
| 19 Jan 2027 | Regulatory decision
NESO's BSC Modification P502 moves through Assessment Procedure to create Supplier/Aggregator compensation mechanism for ABSVD-driven imbalance adjustments |
Balancing · REAL-TIME | United Kingdom | Suppliers, Independent Aggregators +3 |
| 21 Jan 2027 | Regulatory decision
ACER review of NEMOs’ EU market-algorithm amendment remains underway |
Energy · MULTI-TIMEFRAME | Europe-wide / cross-border | NEMOs, TSOs +1 |
| 21 Jan 2027 | Regulatory decision
MCCG webinar details SDAC/SIDC operational progress: XBID 5.0 corrective measures, 15-min MTU one-year review, fallback robustness workstreams, storage orders consultation outcomes, and IT architecture assessment |
Energy · MULTI-TIMEFRAME | Europe-wide / cross-border | NEMOs, TSOs +5 |
| 27 Jan 2027 | Consultation deadline
P502 Timetable Firms Up: Elexon Specifies January 2027 Assessment Procedure Consultation Window |
Balancing · REAL-TIME | United Kingdom | Suppliers, Independent Aggregators +2 |
| February 2027 | ||||
| 11 Feb 2027 | Regulatory decision
BSC Modification P462: Removal of CfD/RO Subsidy Distortion from Balancing Mechanism Bid Prices Advances Through Assessment Procedure |
Balancing · REAL-TIME | United Kingdom | BSC Parties, Balancing Mechanism Units +4 |
| 11 Feb 2027 | Review
P510: Fifth Workgroup Meeting Held as Scheduled, Assessment Report Deadline of 11 February 2027 Reaffirmed |
Energy · MULTI-TIMEFRAME | United Kingdom | Virtual Trading Parties, Virtual Lead Parties +3 |
| 11 Feb 2027 | Review
Elexon confirms P462 Workgroup meeting 18 held and full Assessment Procedure timetable through May 2027 unchanged |
Balancing · REAL-TIME | United Kingdom | National Grid ESO (Proposer), Generators receiving CfD support +4 |
| 11 Feb 2027 | Review
BSC Modification P522 Proposes Subsidy-Adjusted Shadow Bid Price for GB Balancing Mechanism Transparency |
Balancing · REAL-TIME | United Kingdom | BMU operators/generators receiving subsidies, NESO (system operator) +3 |
| 11 Feb 2027 | Regulatory decision
Elexon's BSC Modification P510 advances through Assessment Procedure to replace mutualised VTP compensation with direct bidirectional mechanism in GB Wholesale Market |
Energy · MULTI-TIMEFRAME | United Kingdom | Virtual Trading Parties (VTPs), Electricity Suppliers +5 |
| 11 Feb 2027 | Review
P462 Adds CEPA Cost-Benefit Analysis Phase-Two Addendum, Timetable Still Unchanged Ahead of November-December 2026 Consultation |
Balancing · REAL-TIME | United Kingdom | CfD-supported generators, RO-supported generators +6 |
| 11 Feb 2027 | Review
Zenobe Energy submits BSC Modification P522 to introduce subsidy-adjusted Shadow Bid Price for Balancing Mechanism transparency |
Balancing · REAL-TIME | United Kingdom | Balancing Mechanism Units (BMUs), Subsidised generators +3 |
| 11 Feb 2027 | Review
BSC Modification P462: GB industry Workgroup advances proposal to strip subsidy distortion from Balancing Mechanism Bid Prices via BSC Section T amendment |
Balancing · REAL-TIME | United Kingdom | Balancing Mechanism Participants, NGESO (System Operator) +3 |
| 28 Feb 2027 | Implementation deadline
PJM Confirms RBP Suspension, Elaborates on FERC's Conditional Acceptance and Eligibility Scope |
Capacity · FORWARD | PJM, United States | new generation/capacity resource developers, large load customers +3 |
| March 2027 | ||||
| 1 Mar 2027 | Implementation deadline
CRE issues companion favorable opinion (Deliberation 2026-177) detailing acompte invoicing calendar for France's capacity-mechanism cost-allocation tax |
Capacity · N/A | France | RTE, Enedis +2 |
| 1 Mar 2027 | Go-live
CRE grants Enedis a 4-year regulatory sandbox derogation to test DC low-voltage network tariffs (TURPE) at Douai pilot site |
Flexibility · N/A | France | Enedis, Douaisis Agglo +5 |
| 11 Mar 2027 | Review
BSC Modification P493 advances through Workgroup assessment to improve Transmission Loss Factor transparency and forecasting |
Balancing · N/A | United Kingdom | Generators, Suppliers +3 |
| 23 Mar 2027 | Consultation deadline
BSC Modification P462: Removal of CfD/RO Subsidy Distortion from Balancing Mechanism Bid Prices Advances Through Assessment Procedure |
Balancing · REAL-TIME | United Kingdom | BSC Parties, Balancing Mechanism Units +4 |
| 23 Mar 2027 | Consultation deadline
Elexon confirms P462 Workgroup meeting 18 held and full Assessment Procedure timetable through May 2027 unchanged |
Balancing · REAL-TIME | United Kingdom | National Grid ESO (Proposer), Generators receiving CfD support +4 |
| 23 Mar 2027 | Consultation deadline
BSC Modification P522 Proposes Subsidy-Adjusted Shadow Bid Price for GB Balancing Mechanism Transparency |
Balancing · REAL-TIME | United Kingdom | BMU operators/generators receiving subsidies, NESO (system operator) +3 |
| 23 Mar 2027 | Consultation deadline
P462 Adds CEPA Cost-Benefit Analysis Phase-Two Addendum, Timetable Still Unchanged Ahead of November-December 2026 Consultation |
Balancing · REAL-TIME | United Kingdom | CfD-supported generators, RO-supported generators +6 |
| 23 Mar 2027 | Consultation deadline
Zenobe Energy submits BSC Modification P522 to introduce subsidy-adjusted Shadow Bid Price for Balancing Mechanism transparency |
Balancing · REAL-TIME | United Kingdom | Balancing Mechanism Units (BMUs), Subsidised generators +3 |
| 23 Mar 2027 | Consultation deadline
BSC Modification P462: GB industry Workgroup advances proposal to strip subsidy distortion from Balancing Mechanism Bid Prices via BSC Section T amendment |
Balancing · REAL-TIME | United Kingdom | Balancing Mechanism Participants, NGESO (System Operator) +3 |
| April 2027 | ||||
| 1 Apr 2027 | Implementation deadline
NESO proposes CMP457 to overhaul ORPS reactive power compensation methodology under CUSC |
Balancing · REAL-TIME | United Kingdom | Transmission-connected Generators, Transmission Owners (TOs) +3 |
| May 2027 | ||||
| 1 May 2027 | Milestone
SPP Market Monitor Flags Ramp, Pricing and Resource Adequacy Deficiencies After Three West BAA EEA Events |
Balancing · MULTI-TIMEFRAME | SPP | Generation owners in West BAA, Load serving entities in West BAA +5 |
| 8 May 2027 | Review
P412 Workgroup Meeting 7 Confirmed Held on 29 October 2026; All Downstream Dates Still TBC |
Balancing · REAL-TIME | United Kingdom | Non-BM Balancing Services Providers, National Grid ESO +2 |
| 13 May 2027 | Regulatory decision
BSC Modification P462: Removal of CfD/RO Subsidy Distortion from Balancing Mechanism Bid Prices Advances Through Assessment Procedure |
Balancing · REAL-TIME | United Kingdom | BSC Parties, Balancing Mechanism Units +4 |
| 13 May 2027 | Review
Elexon confirms P462 Workgroup meeting 18 held and full Assessment Procedure timetable through May 2027 unchanged |
Balancing · REAL-TIME | United Kingdom | National Grid ESO (Proposer), Generators receiving CfD support +4 |
| 13 May 2027 | Review
BSC Modification P522 Proposes Subsidy-Adjusted Shadow Bid Price for GB Balancing Mechanism Transparency |
Balancing · REAL-TIME | United Kingdom | BMU operators/generators receiving subsidies, NESO (system operator) +3 |
| 13 May 2027 | Regulatory decision
BSC Modification P522 Proposes Subsidy-Adjusted Shadow Bid Price for GB Balancing Mechanism Transparency |
Balancing · REAL-TIME | United Kingdom | BMU operators/generators receiving subsidies, NESO (system operator) +3 |
| 13 May 2027 | Regulatory decision
P502 Assessment Procedure Consultation Slips Four Months to January 2027 (TBC), Delaying GB Supplier-Aggregator Compensation Timeline |
Balancing · REAL-TIME | United Kingdom | Suppliers, Independent Aggregators +2 |
| 13 May 2027 | Review
P462 Adds CEPA Cost-Benefit Analysis Phase-Two Addendum, Timetable Still Unchanged Ahead of November-December 2026 Consultation |
Balancing · REAL-TIME | United Kingdom | CfD-supported generators, RO-supported generators +6 |
| 13 May 2027 | Review
BSC Modification P493 advances through Workgroup assessment to improve Transmission Loss Factor transparency and forecasting |
Balancing · N/A | United Kingdom | Generators, Suppliers +3 |
| 13 May 2027 | Review
Zenobe Energy submits BSC Modification P522 to introduce subsidy-adjusted Shadow Bid Price for Balancing Mechanism transparency |
Balancing · REAL-TIME | United Kingdom | Balancing Mechanism Units (BMUs), Subsidised generators +3 |
| 13 May 2027 | Regulatory decision
Zenobe Energy submits BSC Modification P522 to introduce subsidy-adjusted Shadow Bid Price for Balancing Mechanism transparency |
Balancing · REAL-TIME | United Kingdom | Balancing Mechanism Units (BMUs), Subsidised generators +3 |
| 13 May 2027 | Review
BSC Modification P462: GB industry Workgroup advances proposal to strip subsidy distortion from Balancing Mechanism Bid Prices via BSC Section T amendment |
Balancing · REAL-TIME | United Kingdom | Balancing Mechanism Participants, NGESO (System Operator) +3 |
| 13 May 2027 | Milestone
P502 Timetable Firms Up: Elexon Specifies January 2027 Assessment Procedure Consultation Window |
Balancing · REAL-TIME | United Kingdom | Suppliers, Independent Aggregators +2 |
| 17 May 2027 | Regulatory decision
BSC Modification P462: Removal of CfD/RO Subsidy Distortion from Balancing Mechanism Bid Prices Advances Through Assessment Procedure |
Balancing · REAL-TIME | United Kingdom | BSC Parties, Balancing Mechanism Units +4 |
| 17 May 2027 | Regulatory decision
Elexon confirms P462 Workgroup meeting 18 held and full Assessment Procedure timetable through May 2027 unchanged |
Balancing · REAL-TIME | United Kingdom | National Grid ESO (Proposer), Generators receiving CfD support +4 |
| 17 May 2027 | Regulatory decision
P462 Adds CEPA Cost-Benefit Analysis Phase-Two Addendum, Timetable Still Unchanged Ahead of November-December 2026 Consultation |
Balancing · REAL-TIME | United Kingdom | CfD-supported generators, RO-supported generators +6 |
| 17 May 2027 | Regulatory decision
BSC Modification P493 advances through Workgroup assessment to improve Transmission Loss Factor transparency and forecasting |
Balancing · N/A | United Kingdom | Generators, Suppliers +3 |
| 17 May 2027 | Regulatory decision
BSC Modification P462: GB industry Workgroup advances proposal to strip subsidy distortion from Balancing Mechanism Bid Prices via BSC Section T amendment |
Balancing · REAL-TIME | United Kingdom | Balancing Mechanism Participants, NGESO (System Operator) +3 |
| June 2027 | ||||
| 12 Jun 2027 | Consultation deadline
P412 Workgroup Meeting 7 Confirmed Held on 29 October 2026; All Downstream Dates Still TBC |
Balancing · REAL-TIME | United Kingdom | Non-BM Balancing Services Providers, National Grid ESO +2 |
| 18 Jun 2027 | Consultation deadline
P502 Assessment Procedure Consultation Slips Four Months to January 2027 (TBC), Delaying GB Supplier-Aggregator Compensation Timeline |
Balancing · REAL-TIME | United Kingdom | Suppliers, Independent Aggregators +2 |
| 18 Jun 2027 | Consultation deadline
P502 Timetable Firms Up: Elexon Specifies January 2027 Assessment Procedure Consultation Window |
Balancing · REAL-TIME | United Kingdom | Suppliers, Independent Aggregators +2 |
| July 2027 | ||||
| 8 Jul 2027 | Review
P502 Assessment Procedure Consultation Slips Four Months to January 2027 (TBC), Delaying GB Supplier-Aggregator Compensation Timeline |
Balancing · REAL-TIME | United Kingdom | Suppliers, Independent Aggregators +2 |
| 8 Jul 2027 | Milestone
P502 Timetable Firms Up: Elexon Specifies January 2027 Assessment Procedure Consultation Window |
Balancing · REAL-TIME | United Kingdom | Suppliers, Independent Aggregators +2 |
| 10 Jul 2027 | Review
P412 Workgroup Meeting 7 Confirmed Held on 29 October 2026; All Downstream Dates Still TBC |
Balancing · REAL-TIME | United Kingdom | Non-BM Balancing Services Providers, National Grid ESO +2 |
| 14 Jul 2027 | Milestone
P412 Workgroup Meeting 7 Confirmed Held on 29 October 2026; All Downstream Dates Still TBC |
Balancing · REAL-TIME | United Kingdom | Non-BM Balancing Services Providers, National Grid ESO +2 |
| 19 Jul 2027 | Regulatory decision
P502 Assessment Procedure Consultation Slips Four Months to January 2027 (TBC), Delaying GB Supplier-Aggregator Compensation Timeline |
Balancing · REAL-TIME | United Kingdom | Suppliers, Independent Aggregators +2 |
| 19 Jul 2027 | Regulatory decision
P502 Timetable Firms Up: Elexon Specifies January 2027 Assessment Procedure Consultation Window |
Balancing · REAL-TIME | United Kingdom | Suppliers, Independent Aggregators +2 |
| September 2027 | ||||
| 30 Sept 2027 | Implementation deadline
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 |
Energy · MULTI-TIMEFRAME | United Kingdom | NESO, Ofgem +3 |
| October 2027 | ||||
| 13 Oct 2027 | Auction
Commission publishes revised 2026 and 2027 EU ETS1 auction calendars with 190.5 million allowances entering the MSR |
Carbon · MULTI-TIMEFRAME | Ireland, United Kingdom, Europe-wide / cross-border | Power generators, Industrial installations +6 |
| November 2027 | ||||
| 1 Nov 2027 | Go-live
CRE orders RTE to align Tempo red-day selection with capacity mechanism's Peak Period algorithm |
Flexibility · N/A | France | RTE, EDF +4 |
| 1 Nov 2027 | Implementation deadline
CRE approves RTE's revised NEBCO market rules: new capacity-mechanism-linked payment formulas, extended panel-method learning period, delayed ELD rollout, and temporary reliability-indicator derogation |
Flexibility · N/A | France | RTE, CRE +6 |
| 1 Nov 2027 | Go-live
CREG validates Elia's Y-1 capacity auction results for Belgium's 2027-2028 CRM delivery period |
Capacity · FORWARD | Belgium | Elia Transmission Belgium, CREG +4 |