System balancing reports
On this page, you will find reports that we publish relating to the commercial operation of the electricity transmission system.
The service reports show the requirements for balancing services and the results of tender assessments. A service by service summary of the cost of balancing services is provided in the monthly balancing services summary (MBSS).
Service reports
The service reports show the requirements for balancing services and the results of tender assessments. A service by service summary of the cost of balancing services is provided in the monthly balancing services summary (MBSS).
Monthly balancing services summaries (MBSS)
From 2nd March 2020, MBSS files will be published on our new NESO Data Portal.
Please see link below for the location:
| Name | Published Sort ascending |
|---|---|
| MBSS Data November 2019 | 31 Dec 2019 |
| MBSS Data October 2019 | 29 Nov 2019 |
| MBSS October 2019 | 29 Nov 2019 |
| MBSS September 2019 | 31 Oct 2019 |
| MBSS Data September 2019 | 31 Oct 2019 |
| MBSS August 2019 | 30 Sep 2019 |
| MBSS Data August 2019 | 30 Sep 2019 |
| MBSS July 2019 | 30 Aug 2019 |
| MBSS Data July 19 | 30 Aug 2019 |
| MBSS June 2019 | 31 Jul 2019 |
Past MBSS packs
Past MBSS packs
From 1st March 2020, Daily balancing costs (BSUoS) files will be published on our new NESO Data Portal.
Please see link below for the daily historic outturn & forecast file:
https://data.nationalenergyso.com/balancing/bsuos-monthly-cost
Please see link below for the daily balancing costs data files:
https://data.nationalenergyso.com/balancing/daily-balancing-costs-balancing-services-use-of-system
Please see link below for the daily balancing costs report files:
| Name | Published Sort ascending |
|---|---|
| 2020-02-27 PDF | 2 Mar 2020 |
| 2020-02-26 excel | 27 Feb 2020 |
| Daily Balancing Costs 1920 Excel | 27 Feb 2020 |
| 2020-02-26 pdf | 27 Feb 2020 |
| 2020-02-24 excel | 26 Feb 2020 |
| 2020-02-25 pdf | 26 Feb 2020 |
| 2020-02-24 pdf | 26 Feb 2020 |
| 2020-02-25 excel | 26 Feb 2020 |
| 2020-02-23 Excel | 25 Feb 2020 |
| 2020-02-21 EXCEL | 25 Feb 2020 |
STOR
| Name | Published Sort ascending |
|---|---|
| TR37 Results Appendix (Corrected STOR ID) - EXT | 26 Feb 2019 |
| TR37 Results Appendix - EXT | 22 Feb 2019 |
| STOR - Update for Market Participants | 6 Nov 2018 |
| TR36_MIR_tables_and_charts | 12 Oct 2018 |
| STOR TR36 MIR | 12 Oct 2018 |
| TR36 Results Appendix - EXT | 21 Sep 2018 |
| STOR TR35 MIR | 27 Jul 2018 |
| TR35_MIR_tables_and_charts | 27 Jul 2018 |
| TR35 Results Appendix | 29 Jun 2018 |
| STOR TR34 MIR | 23 Mar 2018 |
Fast reserve
| Name | Published Sort ascending |
|---|---|
| FR Market Information August20 | 25 Jun 2020 |
| FR Market Information July20 | 16 Jun 2020 |
| FR Market Information Feb19 | 30 Apr 2020 |
| FR Market Information June20 | 30 Apr 2020 |
| FR Market Information Apr19 | 30 Apr 2020 |
| Fast Reserve Market Information Report - Guide | 9 Apr 2020 |
| FR Market Information April20 | 8 Apr 2020 |
| FR Market Information March20 | 8 Apr 2020 |
| FR Market Information May20 | 8 Apr 2020 |
| Fast Reserve Webex December 2019 | 20 Dec 2019 |
FFR market information reports
| Name | Published Sort ascending |
|---|---|
| Frequency Response Products MIR March 2023 | 1 Mar 2023 |
| Frequency Response Products MIR February 2023 | 1 Feb 2023 |
| Frequency Response Products MIR Feb 2023 | 1 Feb 2023 |
| Anonymised EBR consultation responses - Firm Frequency Response | 20 Jan 2023 |
| FFR Market Information Report Jan 2023 | 1 Jan 2023 |
| FFR Market Information Report Oct 2022 | 1 Oct 2022 |
| FFR Market Information Report Sep 2022 | 1 Sep 2022 |
| FFR Market Information Report Aug 2022 | 1 Aug 2022 |
| FFR Market Information Report Jul 2022 | 1 Jul 2022 |
| FFR Market Information Report Jun 2022v3 | 1 Jun 2022 |
FFR pre and post tender
| Name | Published Sort ascending |
|---|---|
| Post Tender Report- TR126 June 2020 - Amended- EXT | 6 Jul 2020 |
| Post Tender Report- TR126 June 2020 - EXT | 16 Jun 2020 |
| Post Tender Report- TR125 May 2020 - EXT | 19 May 2020 |
| Post Tender Report- TR124 April 2020- EXT | 20 Apr 2020 |
| Post Tender Report - TR123 March 2020- EXT | 17 Mar 2020 |
| Post Tender Report - TR122 February 2020- EXT | 14 Feb 2020 |
| Post Tender Report- TR121 January 2020- EXT | 16 Jan 2020 |
| Post Tender Report - TR120 December 2019 - EXT | 13 Dec 2019 |
| Post Tender Report - TR119 November 2019 - EXT | 18 Nov 2019 |
| Post Tender Report - TR118 October 2019 - EXT | 16 Oct 2019 |