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Datasets (115)
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Trading
Balancing Services Contract Enactment
National Grid ESO procures balancing service contracts to balance demand and supply and to ensure the security and quality of electricity supply across Britain's transmission system. For some of…
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Balancing costs
Great Britain System Inertia Bid and Offer Costs
This dataset provides indicative values for the average daily price (in £ per GVAs) for BM accepted offers tagged as being for System Inertia. It also includes the cost of bid actions required to…
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Demand Flexibility Service
Demand Flexibility Service 2022/23: Test Events
Winter 2022/23 Data, The Demand Flexibility Service (DFS) has been developed to allow the NESO to access additional flexibility when the national demand is at its highest – during peak winter days –…
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Ancillary services
Optional Downward Flexibility Management (ODFM) Market Information
In our role as Electricity System Operator (ESO), we balance generation and demand in real time. When demand is low, there may be a requirement for additional flexibility to balance generation and…
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Demand
Transmission Losses
There are a number of factors which influence transmission losses.  These include variations in zonal generation patterns, growth in northern vs southern generation, level of Scottish exports to…
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Demand
Long Term (2-52 weeks ahead) National Demand Forecast
This dataset contains incremental updates for 2-52 weeks ahead demand forecast. The forecast assist the industry to make efficient decisions in balancing their supply and demand positions.
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Ancillary services
Firm Frequency Response (FFR) Post Tender Reports
The Firm Frequency Response (FFR) post tender reports are published following each monthly tender. They indicate which tenders were accepted and rejected and the information submitted for these…
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Demand
National Demand Balancing Mechanism Units
This dataset contains a preliminary list of Balancing Mechanism units that make up National Demand. This is related to the Historic Demand Data published here
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Network charges
Transmission Network Use of System (TNUoS) Tariffs
This dataset contains a breakdown of all the Transmission Network Use of System (TNUoS) tariff elements of which are forecasted and set by the revenue team at National Grid ESO. These files will be…
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Ancillary services
EAC-BR Mock Auction Results
A set of auction results views which present the outcome of daily Enduring Auction Capability (EAC) - Balancing Reserve (BR) mock auction runs. The EAC-BR Mock Auction Results are updated daily in…,…