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Datasets (115)
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Constraint management
24 Months Ahead Constraint Limits
This dataset contains Mega Watt constraint limits for the main boundaries on the transmission system on weekly bases for 24 months ahead.
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Constraint management
24 Months Ahead Constraint Cost Forecast
This dataset contains the 24-month ahead constraint costs on a monthly basis for the main boundaries on the transmission system. These costs are the costs of managing constraint boundaries (for…
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Ancillary services
Short Term Operating Reserve (STOR) Windows
This dataset sets out the Short Term Operating Reserve (STOR) committed windows from Season 15 to Season 19 applicable from 1 April 2021 to 1 April 2026. These seasons define the committed windows…
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System
System Frequency
This page holds the historic system frequency data for Great Britain at a 1 second resolution. It is the role of the National Grid ESO to keep the system frequency at 50 Hz, with a statutory limit of…
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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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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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FES: Pathways to Net Zero
FES: Pathways to Net Zero – Natural Gas, Residential and non-domestic (I&C) Heat Demand Summary Data table (ED3)
The FES: Pathways to Net Zero represent a range of different, credible ways to decarbonise our energy system as we strive towards the 2050 target. One of the FES outputs is an agreed set of data…
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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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System
GIS Boundaries for GB Grid Supply Points
This dataset contains approximate GIS (Geographic Information System) geospatial boundaries associated with each of the Grid Supply Points (GSPs) on the GB transmission network. GSPs are points of…
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System
System Inertia Cost
This data set gives indicative values for the average daily price (in £ per GVAs) for BM accepted offers tagged as being for System Inertia. The tagging process identifies the most likely main reason…