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    Search Guide

    This registry provides comprehensive search capabilities across all Capacity Market components:

    • Company Search: Enter a company name (e.g., "Drax", "EDF") to see all their components
    • Location Search: Search by city, region, or postcode (e.g., "Manchester", "SW1")
    • CMU ID Search: Enter a specific CMU ID to find exact components
    • Technology Search: Enter technology types like "Hydro", "OCGT", or "Battery"

    The search is intelligent and will try to determine what you're looking for based on your query.

    You can combine search terms to narrow results, such as "London Battery" to find battery storage in London.

    Searches are not case-sensitive, and partial matches are supported (e.g., "Manch" will find "Manchester").

    Understanding Auctions

    The Capacity Market runs regular auctions where providers compete to secure agreements. There are two main types:

    • T-4 auctions: Held 4 years ahead of the delivery year
    • T-1 auctions: Held 1 year ahead to fine-tune capacity requirements

    Each auction results in agreements that specify how much capacity providers must deliver and the payment they'll receive.

    Auction years are displayed as badges (e.g., 2023-24) that you can click to view details for that specific auction year.

    The Capacity Market ensures the UK has sufficient electricity supply during periods of high demand or system stress.

    Providers receive payments for ensuring their capacity is available, creating a more stable and resilient electricity market.

    Search Results

    Search results are grouped by location and show important details about each component:

    • Active Components with auction years 2024-25 or later
    • In-Active Components with only auction years before 2024-25
    • Company Name Click to view all components for this company
    • Technology Click to search for this technology type
    • CMU: XXX Click to search for this CMU ID
    • Auction Year Click to view details for this specific auction

    Each result shows the component's capacity, location details, and participation in specific auction years.

    You can sort results by relevance, location, or date using the sort options.

    Pagination controls appear at the bottom when there are multiple pages of results.

    Component Grouping

    Components at the same location with the same description are grouped together to reduce duplication.

    Each group shows:

    • All CMU IDs for components at that location
    • All auction years, sorted with newest first
    • An Active/Inactive status based on auction years

    Grouping helps identify multi-year contracts and related components at the same site.

    The total capacity shown combines all components in the group.

    Components can be expanded to show individual details by clicking the expand icon.

    Sorting and Filtering

    You can sort search results by:

    • Relevance: Most relevant matches first
    • Location: Alphabetical order by location name
    • Date: By auction year (newest or oldest first)
    • Capacity: Highest or lowest capacity first

    Click the column headers to change sort order.

    You can filter results using the search refinements at the top of the results page:

    • Filter by technology type (e.g., only show batteries)
    • Filter by active status (show only active or inactive components)
    • Filter by auction year (show only components from specific auctions)

    Map Explorer & Map View

    We provide two map-based tools for exploring capacity market data:

    Map Explorer

    The Map Explorer is our advanced interactive mapping tool, specifically designed for comprehensive data exploration with:

    • Mobile-Optimized Interface: Responsive design that works perfectly on phones and tablets
    • Advanced Filtering: Filter by technology type, company, delivery year, and active status
    • Smart Sidebar: Desktop users get a dedicated filter panel, mobile users get collapsible filters
    • Full-Screen Map: Maximizes map space for detailed geographical analysis
    Search Map View

    The Search Map View combines search functionality with map visualization, offering:

    • Search-First Approach: Start with text searches, then visualize results on the map
    • Integrated Results: Search results and map display work together
    • Performance Optimized: Streamlined for fast search result mapping

    Both tools provide a visual representation of capacity distribution across the UK, but serve different exploration needs.

    Map Features:
    • Technology Colors: Different technology types are shown with distinct colors on the map for easy identification:
      GasDSRNuclearCHPSolarWind
      BatteryBiomassHydroInterconnectorCoalOther
    • Technology Legend: The map legend shows all available technologies with their corresponding colors and component counts
    • Search Results on Map: You can view any search results on the map by clicking "View on Map" from search results pages
    • Smart Clustering: Areas with multiple components are automatically grouped into clusters - click clusters to zoom in and see individual components
    • Interactive Markers: Click on individual markers to see detailed information about components at that location

    Use the map controls to zoom in on specific regions or areas of interest. The map automatically adjusts clustering based on your zoom level to provide the clearest view of capacity distribution.

    Contact Us

    We're here to help with any questions about the Capacity Market Registry.

    Email

    For general inquiries and support:

    For LLMs

    Complete programmatic access guide for LLMs:

    Search / All Locations / All Postcodes / SL4 / SL4 5GD

    Windsor Battery East, Millstream East, Maidenhead Road, Windsor, Berkshire, SL4 5GD.

    0.09 MW (Est from CMU) (part of 0.09 MW aggregated CMU)
    Total Capacity
    SL4 5GD
    Postcode
    10
    Components
    Active*
    2026-27
    Prequalified
    Prequalification
    * Latest auction year on record
    Descriptions:
    • Battery Storage
    • Glenlee hydro power station - Unit 1, part of the Galloway hydroelectric scheme. The registered capacity of the Glenlee hydro power station is 30MVA or 24MW at 0.8PF and each of the 2 identical generating unit components at the station is 12MW.
    • Gas reciprocating engines
    Other Locations at This Postcode 3 locations
    Windsor Battery West, Millstream East, Maidenhead Road, Windsor, Berkshire, SL4 5GD. 0.05 MW (Est from CMU) (part of 0.05 MW aggregated CMU)
    Hydro CENTRICA BUSINESS SOLUTIONS UK OPTIMISATION LIMITED9 components
    Maidenhead Road, Windsor, SL4 5GD 2.04 MW (Est from CMU) (part of 2.04 MW aggregated CMU)
    DSR CENTRICA BUSINESS SOLUTIONS UK OPTIMISATION LIMITED11 components
    Millstream, Maidenhead Road, Windsor, SL45GD
    Storage (Duration 1h) CENTRICA BUSINESS SOLUTIONS UK LIMITED3 components

    CMU Registry Data

    CMU IND005
    6.206 GFI73 LTD
    Prequalified
  • ✓ Prequalified
  • 2026-27
    Capacity Information
    De-Rated Capacity
    6.206
    Connection/DSR Capacity
    6.5
    Anticipated Capacity
    6.206
    Max Obligation Period
    15
    Unit Information
    CMU Type
    Non CMRS
    Primary Fuel
    Gas
    Category
    New Build Generating CMU
    Storage Facility
    No
    Commercial Information
    Organization
    Company Name
    N/A
    Parent Company
    GFP (Holdings) Limited
    Opt Out Status
    Opt-In
    Agreement Details
    Agreement Awarded
    No
    _id
    13060
    CMU ID
    IND005
    Auction
    Capacity Auction
    Auction Name
    2025-26 (T-4) Four Year Ahead Capacity Auction
    CM Unit Name
    IND005
    Name of Applicant
    GFI73 LTD
    Pre-Qualification Decision
    Prequalified
    Transmission / Distribution
    Distribution
    New Build Yet to Satisfy FCM
    Yes
    CMU confirmed entry into Auction
    Yes
    Secondary Trading Contact - Email
    Secondary Trading Contact - Telephone
    '+4402088956726
    Connection Agreement Deferral Declaration
    Yes
    Duration of Capacity Agreement in First Bidding Round
    15
    Auction Participation History
    2026-27T-42026-27 (T-4) Four Year Ahead Capacity Auction
    0.05 MW Prequalified
    Component ID: 149188
    Capacity: 0.05 MW
    Status: Prequalified
    Auction-specific values (differ from CMU baseline):
    • De-Rated Capacity: 0.047
    • OS Grid Reference: SU 945 771
    • Location and Post Code: Windsor Battery East, Millstream East, Maidenhead Road, Windsor, Berkshire, SL4 5GD.
    • Connection / DSR Capacity: 0.401
    • Generating Technology Class: Storage (Duration 1h)
    • Description of CMU Components: Battery Storage
    CMU MINT6A
    18.872 PD688IRO LTD
    Not Prequalified
  • ✗ Not Prequalified
  • 2025-26
    Capacity Information
    De-Rated Capacity
    18.872
    Connection/DSR Capacity
    47.5
    Anticipated Capacity
    18.872
    Max Obligation Period
    15
    Unit Information
    CMU Type
    CMRS
    Primary Fuel
    Storage - Battery
    Category
    New Build Generating CMU
    Storage Facility
    Yes
    Commercial Information
    Organization
    Company Name
    N/A
    Parent Company
    Pelagic Energy Development Ltd
    Opt Out Status
    Opt-In
    Agreement Details
    _id
    13120
    CMU ID
    MINT6A
    Auction
    Capacity Auction
    Auction Name
    2025-26 (T-4) Four Year Ahead Capacity Auction
    CM Unit Name
    Minety 6A
    Name of Applicant
    PD688IRO LTD
    Amount of Credit Cover
    188720
    Pre-Qualification Decision
    Not Prequalified
    Transmission / Distribution
    Transmission
    Secondary Trading Contact - Email
    Secondary Trading Contact - Telephone
    '+4407973630171
    Auction Participation History
    2025-26T-42025-26 (T-4) Four Year Ahead Capacity Auction
    Not Prequalified
    Component ID: 278074
    Status: Not Prequalified
    Auction-specific values (differ from CMU baseline):
    • OS Grid Reference: SU 945 771
    • Location and Post Code: Windsor Battery East, Millstream East, Maidenhead Road, Windsor, Berkshire, SL4 5GD.
    • Generating Technology Class: Storage (Duration 1h)
    • Description of CMU Components: Battery Storage
    CMU A1MALT
    1.337 REGENT PARK ENERGY …
    Prequalified
  • ✓ Prequalified
  • 2024-25
    Capacity Information
    De-Rated Capacity
    1.337
    Connection/DSR Capacity
    1.4
    Anticipated Capacity
    1.337
    Max Obligation Period
    1
    Unit Information
    CMU Type
    Non CMRS
    Primary Fuel
    Gas
    Category
    Existing Generating CMU
    Storage Facility
    No
    Commercial Information
    Termination Fee Rate 1
    £5000.00 /MW
    Termination Fee Rate 2
    £25000.00 /MW
    Termination Fee Rate 3
    £10000.00 /MW
    Termination Fee Rate 4
    £15000.00 /MW
    Termination Fee Rate 5
    £35000.00 /MW
    Annual Penalty Cap
    1
    Monthly Penalty Cap
    2
    Organization
    Company Name
    N/A
    Parent Company
    Alkane Energy Limited
    Registered Holder
    REGENT PARK ENERGY LIMITED
    Opt Out Status
    Opt-In
    Agreement Details
    Agreement Awarded
    Yes
    Agreement ID
    CAN-2025-A1MALT-001
    Agreement Term
    1
    _id
    12428
    CMU ID
    A1MALT
    Auction
    Capacity Auction
    Auction Name
    2025-26 (T-4) Four Year Ahead Capacity Auction
    CM Unit Name
    Maltby
    Name of Applicant
    REGENT PARK ENERGY LIMITED
    Pre-Qualification Decision
    Prequalified
    Transmission / Distribution
    Distribution
    CMU confirmed entry into Auction
    Yes
    Secondary Trading Contact - Email
    [email protected]
    Date of Issue of Capacity Agreement
    2022-04-01
    Auction Acquired Capacity Obligation
    1.337
    Secondary Trading Contact - Telephone
    '+4401604662400
    Duration of Capacity Agreement Awarded
    1
    Delivery Years for which Agreement Valid
    2025/2026
    Duration of Capacity Agreement in First Bidding Round
    1
    Auction Participation History
    2024-25T-12024-25 (T-1) One Year Ahead Capacity Auction
    0.05 MW Prequalified
    Component ID: 54609
    Capacity: 0.05 MW
    Status: Prequalified
    Auction-specific values (differ from CMU baseline):
    • De-Rated Capacity: 0.045
    • OS Grid Reference: SU 945 771
    • Location and Post Code: Windsor Battery East, Millstream East, Maidenhead Road, Windsor, Berkshire, SL4 5GD.
    • Connection / DSR Capacity: 0.401
    • Primary Fuel of Component: Storage - Battery
    • Generating Technology Class: Storage (Duration 1h)
    • Description of CMU Components: Battery Storage
    CMU 6RES37
    1.106 CENTRICA BUSINESS SOLUTIONS …
    Prequalified
  • ✓ Prequalified
  • 2024-25
    Capacity Information
    De-Rated Capacity
    1.106
    Connection/DSR Capacity
    1.826
    Anticipated Capacity
    1.106
    Max Obligation Period
    1
    Unit Information
    CMU Type
    Non CMRS
    Primary Fuel
    Gas
    Category
    Existing Generating CMU
    Storage Facility
    Yes
    Commercial Information
    Termination Fee Rate 1
    £5000.00 /MW
    Termination Fee Rate 2
    £25000.00 /MW
    Termination Fee Rate 3
    £10000.00 /MW
    Termination Fee Rate 4
    £15000.00 /MW
    Termination Fee Rate 5
    £35000.00 /MW
    Annual Penalty Cap
    1
    Monthly Penalty Cap
    2
    Organization
    Company Name
    N/A
    Parent Company
    Centrica plc
    Registered Holder
    CENTRICA BUSINESS SOLUTIONS UK OPTIMISATION LIMITED
    Opt Out Status
    Opt-In
    Agreement Details
    Agreement Awarded
    Yes
    Agreement ID
    CAN-2021-6RES37-001
    Obligation Summary
    01/10/2021 - 30/09/2022:1.106 MW
    Agreement Term
    1
    _id
    5114
    CMU ID
    6RES37
    Auction
    Capacity Auction
    Auction Name
    2021-22 (T-4) Four Year Ahead Capacity Auction
    CM Unit Name
    6RES37
    Name of Applicant
    CENTRICA BUSINESS SOLUTIONS UK OPTIMISATION LIMITED
    Pre-Qualification Decision
    Prequalified
    Transmission / Distribution
    Distribution
    Secondary Trading Contact - Email
    [email protected]
    Date of Issue of Capacity Agreement
    2021-08-23
    List of Traded Capacity Obligations
    T1: 1.106 MW
    Period for which the transfer applies
    T1: 01/10/2021 - 30/09/2022
    Secondary Trading Contact - Telephone
    '+4407789571247
    Duration of Capacity Agreement Awarded
    1
    Delivery Years for which Agreement Valid
    2021/2022
    Auction Participation History
    2024-25T-42024-25 (T-4) Four Year Ahead Capacity Auction
    Prequalified
    Component ID: 367266
    Status: Prequalified
    Auction-specific values (differ from CMU baseline):
    • OS Grid Reference: NX 606 805
    • Location and Post Code: New Galloway, Castle Douglas, Kirkcudbrightshire, DG7 3SF, Scotland
    • Generating Technology Class: Hydro
    • Description of CMU Components: Glenlee hydro power station - Unit 1, part of the Galloway hydroelectric scheme. The registered capacity of the Glenlee hydro power station is 30MVA or 24MW at 0.8PF and each of the 2 identical generating unit components at the station is 12MW.
    CMU WindE1
    0.688 WATSON HEAD WIND …
    Prequalified
  • ✓ Prequalified
  • 2023-24
    Capacity Information
    De-Rated Capacity
    0.688
    Connection/DSR Capacity
    8.4
    Anticipated Capacity
    0.689
    Max Obligation Period
    1
    Unit Information
    CMU Type
    Non CMRS
    Primary Fuel
    Onshore Wind
    Category
    New Build Generating CMU
    Storage Facility
    No
    Commercial Information
    Organization
    Company Name
    N/A
    Parent Company
    10116532
    Opt Out Status
    Opt-In
    Agreement Details
    _id
    9355
    CMU ID
    WindE1
    Auction
    Capacity Auction
    Auction Name
    2023-24 (T-1) One Year Ahead Capacity Auction
    CM Unit Name
    Watson Head
    Name of Applicant
    WATSON HEAD WIND FARM LIMITED
    Pre-Qualification Decision
    Prequalified
    Transmission / Distribution
    Distribution
    CMU confirmed entry into Auction
    No
    Secondary Trading Contact - Email
    [email protected]
    Secondary Trading Contact - Telephone
    '+4404587611144
    Auction Participation History
    2023-24T-42023-24 (T-4) Four Year Ahead Capacity Auction
    Prequalified
    Component ID: 54617
    Status: Prequalified
    Auction-specific values (differ from CMU baseline):
    • OS Grid Reference: TF 379 635
    • Location and Post Code: Glebe Farm, Grunters Grange, East Keal, Spilsby Lincs PE23 4AY
    • Generating Technology Class: Reciprocating engines
    • Description of CMU Components: 10no. twin pack gas generators with 10no. transformers, DNO substation, 33kV switchroom and ancillary requirements
    CMU 7RES21
    1.118 CENTRICA BUSINESS SOLUTIONS …
    Prequalified (2)
  • ✓ Prequalified
  • ✓ Prequalified
  • 2023-24 2022-2023
    Capacity Information
    De-Rated Capacity
    1.118
    Connection/DSR Capacity
    1.814
    Anticipated Capacity
    1.164
    Max Obligation Period
    1
    Unit Information
    CMU Type
    Non CMRS
    Primary Fuel
    Storage - Battery
    Category
    Existing Generating CMU
    Storage Facility
    Yes
    Commercial Information
    Termination Fee Rate 1
    £5000.00 /MW
    Termination Fee Rate 2
    £25000.00 /MW
    Termination Fee Rate 3
    £10000.00 /MW
    Termination Fee Rate 4
    £15000.00 /MW
    Termination Fee Rate 5
    £35000.00 /MW
    Annual Penalty Cap
    1
    Monthly Penalty Cap
    2
    Organization
    Company Name
    N/A
    Parent Company
    Centrica plc
    Registered Holder
    CENTRICA BUSINESS SOLUTIONS UK OPTIMISATION LIMITED
    Opt Out Status
    Opt-In
    Agreement Details
    Agreement Awarded
    Yes
    Agreement ID
    CAN-2022-7RES21-001
    Agreement Term
    1
    _id
    6423
    CMU ID
    7RES21
    Auction
    Capacity Auction
    Auction Name
    2022-23 (T-1) One Year Ahead Capacity Auction
    CM Unit Name
    6RES37
    Name of Applicant
    CENTRICA BUSINESS SOLUTIONS UK OPTIMISATION LIMITED
    Pre-Qualification Decision
    Prequalified
    Transmission / Distribution
    Distribution
    CMU confirmed entry into Auction
    Yes
    Secondary Trading Contact - Email
    [email protected]
    Date of Issue of Capacity Agreement
    2022-03-25
    Auction Acquired Capacity Obligation
    1.118
    Secondary Trading Contact - Telephone
    '+4407789571247
    Capacity Agreement has been Terminated
    Yes
    Duration of Capacity Agreement Awarded
    1
    Delivery Years for which Agreement Valid
    2022/2023
    Date of Termination of Capacity Agreement
    2022-12-15
    Duration of Capacity Agreement in First Bidding Round
    1
    Auction Participation History
    2023-24T-42023-24 (T-4) Four Year Ahead Capacity Auction
    Prequalified
    Component ID: 278083
    Status: Prequalified
    Auction-specific values (differ from CMU baseline):
    • OS Grid Reference: SK 552 682
    • Location and Post Code: Warsop Energy Park, Carter Lane, Warsop Vale, NG20 8XG
    • Generating Technology Class: Reciprocating engines
    • Description of CMU Components: Gas reciprocating engines
    2022-23T-12022-23 (T-1) One Year Ahead Capacity Auction
    Prequalified
    Component ID: 723521
    Status: Prequalified
    Auction-specific values (differ from CMU baseline):
    • OS Grid Reference: SU 945 771
    • Location and Post Code: Windsor Battery East, Millstream East, Maidenhead Road, Windsor, Berkshire, SL4 5GD.
    • Generating Technology Class: Storage (Duration 1h)
    • Description of CMU Components: Battery Storage
    2022-23T-12022-23 (T-1) One Year Ahead Capacity Auction
    Prequalified
    Component ID: 575987
    Status: Prequalified
    Auction-specific values (differ from CMU baseline):
    • OS Grid Reference: SU 945 771
    • Location and Post Code: Windsor Battery East, Millstream East, Maidenhead Road, Windsor, Berkshire, SL4 5GD.
    • Generating Technology Class: Storage (Duration 1h)
    • Description of CMU Components: Battery Storage
    2022-23T-12022-23 (T-1) One Year Ahead Capacity Auction
    Prequalified
    Component ID: 624745
    Status: Prequalified
    Auction-specific values (differ from CMU baseline):
    • OS Grid Reference: SU 945 771
    • Location and Post Code: Windsor Battery East, Millstream East, Maidenhead Road, Windsor, Berkshire, SL4 5GD.
    • Generating Technology Class: Storage (Duration 1h)
    • Description of CMU Components: Battery Storage
    CMU CEN015
    2.661 E.ON UK PLC
    Prequalified
  • ✓ Prequalified
  • 2021-22
    Capacity Information
    De-Rated Capacity
    2.661
    Connection/DSR Capacity
    2.913
    Anticipated Capacity
    2.703
    Max Obligation Period
    1
    Unit Information
    CMU Type
    Non CMRS
    Primary Fuel
    Gas
    Category
    Existing Generating CMU
    Storage Facility
    No
    Commercial Information
    Termination Fee Rate 1
    £5000.00 /MW
    Termination Fee Rate 2
    £25000.00 /MW
    Termination Fee Rate 3
    £10000.00 /MW
    Termination Fee Rate 4
    £15000.00 /MW
    Termination Fee Rate 5
    £35000.00 /MW
    Annual Penalty Cap
    1
    Monthly Penalty Cap
    2
    Organization
    Company Name
    N/A
    Registered Holder
    E.ON UK PLC
    Opt Out Status
    Opt-In
    Agreement Details
    Agreement Awarded
    Yes
    Agreement ID
    CAN-2026-CEN015-001
    Agreement Term
    1
    _id
    13563
    CMU ID
    CEN015
    Auction
    Capacity Auction
    Auction Name
    2026-27 (T-4) Four Year Ahead Capacity Auction
    CM Unit Name
    CE_Aggregated 2
    Name of Applicant
    E.ON UK PLC
    Pre-Qualification Decision
    Prequalified
    Transmission / Distribution
    Distribution
    CMU confirmed entry into Auction
    Yes
    Secondary Trading Contact - Email
    [email protected]
    Date of Issue of Capacity Agreement
    2023-03-31
    Auction Acquired Capacity Obligation
    2.661
    Secondary Trading Contact - Telephone
    '+4407816292478
    Duration of Capacity Agreement Awarded
    1
    Delivery Years for which Agreement Valid
    2026/2027
    Duration of Capacity Agreement in First Bidding Round
    1
    Auction Participation History
    2021-22T-42021-22 (T-4) Four Year Ahead Capacity Auction
    Prequalified
    Component ID: 367249
    Status: Prequalified
    Auction-specific values (differ from CMU baseline):
    • OS Grid Reference: SU 945 771
    • Location and Post Code: Windsor Battery East, Millstream East, Maidenhead Road, Windsor, Berkshire, SL4 5GD.
    • Generating Technology Class: Storage (Duration 1h)
    • Description of CMU Components: Battery Storage
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