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Data Groups

Ancillary Services

We procure services to balance demand and supply and to ensure the security of electricity supply across Britain’s transmission system. On this...

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Balancing Costs

Data on forecast and historic balancing costs, including BSUoS costs and forecasts.

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Carbon Intensity

Data providing an indicative trend of regional and national carbon intensity of the GB electricity system. This includes emissions from all large...

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Connection Registers

This section contains data to the connections registers prepared by our connections team. These registers are published twice weekly and show the...

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Constraint Management

Constraint management is required where the electricity transmission system is unable to transmit power to the location of demand, due to congestion...

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Demand

This data group houses forecast and historic data for: electricity demand, interconnectors, pump storage pumping, wind generation and solar...

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Future Energy Scenarios

Future Energy Scenarios (FES) represent a range of different, credible ways to decarbonise our energy system as we strive towards the 2050 target. FES...

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Generation

The Generation data group is comprised of a number of datasets. Firstly, forecast volumes and cost for our reserve margin, at a number of different...

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Network Charges

This data group includes Transmission Network Use of System (TNUoS) Tariffs and other relevant publications associated with TNUoS revenue and charges.

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Plans, Reports & Insights

This group contains data that spans a number of the other groups, for example, information supporting the ESO Operational Transparency Forum

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System

System-wide data are maintained in this data group; for example, historic data on system frequency.

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Trading

We trade power exchange contracts, forward energy, and balancing contracts to meet forecast energy requirements. All trading is in advance of the...

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