On this page, you can download and use our data finder to quickly and easily locate the data you're looking for. You can also explore data on this page relating to the commercial operation of the National Electricity Transmission System (NETS).
Data finder
Please click on our interactive data finder below to quickly and easily locate the data you require. You can also download the interactive PDF for future use.
Forecast volumes and costs
Here you can find the breakdown of operating margin (OPMR) based on forecast volume of reserve, frequency response required, annual weighting factors for STOR contracts, and BSIS and BSUoS costs.
Data explorer
You can explore the data below which includes cost and volume forecasts, and outcomes relating to balancing services, reserve, and response. We also include information here associated with contract and services reports, showing the costs of balancing services and the results of tender assessments.
Real-time demand data
Click here to view a graph of demand data over the last 60 minutes.
Our Demand Data Strategy
Historic demand data
From 06 November 2018, Demand Data Update file will be published on this new page.
| Name | Published Sort ascending |
|---|---|
| Demand Data Update | 11 Feb 2019 |
| Demand Data 2018 | 14 Dec 2018 |
| Demand Data 2017 | 24 Jan 2018 |
| FAQ | 1 Dec 2017 |
| Demand Data Field Descriptions | 1 Dec 2017 |
| Demand Data 2011-2016 | 1 Dec 2017 |
| Demand Data 2005-2010 | 10 Mar 2017 |
| Request For Customer Feedback on National Grid Energy Forecasting | 6 Mar 2017 |
| Weather Corrected Demands | 24 Jun 2016 |
Demand incentive forecasts
From 28 July 2018, new demand forecasts data will be published on this new page.
Wind incentive forecasts
From 28 July 2018, new wind incentive forecasts data will be published on this new page.
Click here to view historic second-by-second frequency data.
Reactive energy volumes and data
| Name | Published Sort ascending |
|---|---|
| 06 Reactive Utilisation October-September 2017 | 8 Nov 2017 |
| 06 Reactive Utilisation October-August 2017 | 12 Oct 2017 |
| 06 Reactive Utilisation October-July 2017 | 7 Sep 2017 |
| 06 Reactive Utilisation October-June 2017 | 15 Aug 2017 |
| 06 Reactive Utilisation October-May 2017 | 26 Jul 2017 |
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.
| Name | Published Sort ascending |
|---|---|
| 09 Apr 2019 Contract Volume | 9 Apr 2019 |
| 08 Apr 2019 Contract Volume | 8 Apr 2019 |
| 07 Apr 2019 Contract Volume | 7 Apr 2019 |
| 02 Apr 2019 Contract Volume | 2 Apr 2019 |
| 01 Apr 2019 Contract Volume | 1 Apr 2019 |
| 30 Sep 2018 Contract Volume | 30 Sep 2018 |
| 29 Sep 2018 Contract Volume | 29 Sep 2018 |
| 28 Sep 2018 Contract Volume | 28 Sep 2018 |
| 26 September 2018 Contract Volume | 26 Sep 2018 |
| 24 September 2018 Contract Volume | 24 Sep 2018 |
Fixed price and index-linked contract volumes
As announced in the NGESO Forum and Transparency Seminars, as well as the notice here, the Fixed price and index-linked contract volumes have now (on Dec 11th, 2020) moved to our new exciting data portal, you can also find historic enactment there too. If you have any questions, please don't hesitate to contact us.
| Name | Published Sort ascending |
|---|---|
| 05-12-2020 Contract Volume | 5 Dec 2020 |
| 03 Dec 2020 Contract Volume | 3 Dec 2020 |
| 19 Nov 2020 Contract Volume | 19 Nov 2020 |
| 14 Nov 2020 Contract Volume | 14 Nov 2020 |
| 13-11-2020 Contract Volume | 13 Nov 2020 |
| 12-11-2020 Contract Volume | 12 Nov 2020 |
| 09-11-2020 Contract Volume | 9 Nov 2020 |
| 08-11-2020 Contract Volume | 8 Nov 2020 |
| 18 Oct 2020 Contract Volume | 18 Oct 2020 |
| 17-09-2020 ContractVolume | 18 Sep 2020 |
Fixed price and index-linked contract volumes (past)
These are documents related to the outturn for energy services we have used such as STOR, fast reserve, fast start, and frequency response.
STOR
| Name | Published Sort ascending |
|---|---|
| STOR Cost and Vols 08 November 2015 | 30 Oct 2015 |
| STOR Cost and Vols 06 November 2015 | 30 Oct 2015 |
| STOR Cost and Vols 04 November 2015 | 30 Oct 2015 |
| STOR Cost and Vols 02 November 2015 | 30 Oct 2015 |
| STOR Cost and Vols 07 November 2015 | 30 Oct 2015 |
| STOR Cost and Vols 05 November 2015 | 30 Oct 2015 |
| STOR Cost and Vols 03 November 2015 | 30 Oct 2015 |
| STOR Cost and Vols 31 October 2015 | 23 Oct 2015 |
| STOR Cost and Vols 29 October 2015 | 23 Oct 2015 |
| STOR Cost and Vols 27 October 2015 | 23 Oct 2015 |
Frequency response - FFR
| Name | Published Sort ascending |
|---|---|
| 2023-24 Frequency Response volumes D3 | 5 Dec 2023 |
| April 2023 - March 2024 FFR Market Report | 13 Nov 2023 |
| 2023-24 Frequency Response volumes D9 | 13 Nov 2023 |
| April 2022 - March 2023 FFR Market Report | 17 Apr 2023 |
| 2022-23 Frequency Response Volumes D9 | 17 Apr 2023 |
| 2022-23 Frequency Response Volumes D3 | 5 Apr 2023 |
| April 2021 - March 2022 FFR Market Report | 13 May 2022 |
| 2021-22 Frequency Response Volumes D9 | 13 Apr 2022 |
| 2021-22 Frequency Response Volumes D3 | 5 Apr 2022 |
| 2021-22 Frequency Response Volumes D3 | 5 Oct 2021 |
Balancing services adjustment data (BSAD)
We are required to publish BSAD. You can access the data via the BSAD portal.
For any issues in the contact us please contact on [email protected].
Trading data
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.