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Datasets (115)
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Ancillary services
Contract Transfer of Obligation
The “Contract Transfer of Obligation” will be updated when ESO receives a Market Provider request to transfer a Balancing Service contract from a contracted unit to a non-contracted unit. This file…
  • CSV
FES: Pathways to Net Zero
Local Authority Level Spatial Heat Model Outputs (FES)
This dataset represents the regional results from the Spatial Heat model used as part of the Future Energy Scenarios. The 2021 data was generated to support a thought piece to explore the findings…
  • ZIP
  • CSV
Ancillary services
Phase 2: FFR Auction Results Summary
As part of our work on developing our balancing services we ran a weekly trial auction for Firm Frequency Response. The weekly auction trial results and order hash data are available here., Note:,…
  • CSV
Constraint management
Year Ahead Constraint Limits
This dataset contains a year ahead Mega Watt constraint limits for the main boundaries on the transmission system., NOTE:, This dataset has now been replaced by the "24 Months Ahead Constraint…
  • CSV
Balancing costs
Daily Balancing Services Use of System (BSUoS) Forecast
This file contains the Electricity System Operator's (ESO) half-hourly BSUoS forecast (Balancing Services Use of System charge). The estimated BSUoS charge is calculated by taking the forecast…