On this page, you will find data we've published relating to the commercial operation of the National Electricity Transmission System (NETS). This data includes cost and volume forecasts, and outcomes relating to balancing services, reserve, and response. We also include information associated with contract and services reports, showing the costs of balancing services and the results of tender assessments.
Historic demand data
From 06 November 2018, Demand Data Update file will be published on this new page.
Demand incentive forecasts
From 28 July 2018, new demand forecasts data will be published on this new page.
Outcome system services
Find out about contracted and reactive energy volumes and data.
Reactive energy volumes and data
Contracted energy volumes and data
As of 24 November 2017, contract volume files are split by fixed price and index-linked volumes. See the Fixed price and index-linked contract volumes section for these files.
Fixed price and index-linked contract volumes
Fixed price and index-linked contract volumes (past)
Outcome energy services
These are documents related to the outturn for energy services we have used such as STOR, fast reserve, fast start, and frequency response.
Frequency response - FFR
Balancing services adjustment data (BSAD)
To find data for forward contracts, please go to our forward contracts data feed.
PGBT offer details
We will provide PGBT offer submission data on a reasonable-endeavours basis by the end of business day + 1.
Each PGBT offer submission is reported against the start date of the PGBT requirement with which this offer is associated.
All valid offers will be published even if they are subsequently withdrawn or expire.
The Requirement Identifier Code is a unique number associated with each PGBT requirement identified by National Grid.
If you have any questions, please contact our NETA helpdesk on 0800 777770.