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Datasets (117)
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Balancing costs
Dispatch Transparency
This dataset is a component of the Forward Plan 2020-21 commitment to increase the transparency of our operational decision making in the Balancing Mechanism (BM). It includes the publication of…,…
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Constraint management
Constraint Management Intertrip Service Information (CMIS)
This dataset gives information on the arming and disarming of units contracted under CMIS (previously known as Constraint Management Pathfinder). The information is provided for each instance of…,…
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Ancillary services
Ancillary Services Important Industry Notifications
The dataset contains the latest update on important ancillary services procurement changes. Please subscribe to get the latest update.
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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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FES: Pathways to Net Zero
FES: Pathways to Net Zero – Electricity Demand Summary Data table (ED1)
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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FES: Pathways to Net Zero
FES: Pathways to Net Zero – Road Transport Summary Data table (ED5)
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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Network charges
Assistance for Areas of High Electricity Distribution Costs (AAHEDC) Tariffs
This dataset contains a breakdown of all the Assistance for Areas of High Electricity Distribution Costs (AAHEDC) Tariffs elements which are forecasted and set by the revenue team at National Grid…
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Constraint management
Voltage System Costs
To give greater insight on balancing decisions, this post monthly report provides outturn system costs for maintaining voltage levels on the network. Maintaining the electricity system at the correct…