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 February 2019 | 27 Mar 2019 |
| MBSS February 2019 pdf | 27 Mar 2019 |
| MBSS Data January 2019 | 8 Mar 2019 |
| MBSS January 2019 pdf | 8 Mar 2019 |
| MBSS_DATA_December_2018 | 7 Feb 2019 |
| MBSS_December_2018 | 7 Feb 2019 |
| MBSS_DATA_November_2018 excel | 24 Dec 2018 |
| MBSS_November_2018 pdf | 24 Dec 2018 |
| MBSS_DATA_October_2018 excel | 27 Nov 2018 |
| MBSS_October_2018 pdf | 27 Nov 2018 |
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 |
|---|---|
| 2020-02-18 PDF | 20 Feb 2020 |
| 2020-02-19 PDF | 20 Feb 2020 |
| 2020-02-17 EXCEL | 19 Feb 2020 |
| 2020-02-17 PDF | 19 Feb 2020 |
| 2020-02-14 EXCEL | 18 Feb 2020 |
| 2020-02-15 EXCEL | 18 Feb 2020 |
| 2020-02-14 PDF | 18 Feb 2020 |
| 2020-02-15 PDF | 18 Feb 2020 |
| 2020-02-13 EXCEL | 14 Feb 2020 |
| 2020-02-13 PDF | 14 Feb 2020 |
STOR
| Name | Published Sort ascending |
|---|---|
| TR32_MIR_tables_and_charts - v2 | 28 Jul 2017 |
| TR32 and Runway Appendix - v2 EXT | 21 Jul 2017 |
| STOR TR26 MIR | 10 Jul 2017 |
| STOR Market Information for TR26_Appendix V2 | 10 Jul 2017 |
| STOR Carbon Impact Analysis Report | 10 Jul 2017 |
| STOR Market Information for TR25_Tables_and_Charts v.2 | 10 Jul 2017 |
| STOR_Annual_Market_Report_2013_14_Data | 10 Jul 2017 |
| STOR Market Information for TR25 STOR Runway - Appendix | 10 Jul 2017 |
| STOR Fuel Type Analysis Summary (By Capacity) - Season 8 3 | 10 Jul 2017 |
| STOR Market Info for TR24 - Appendix | 10 Jul 2017 |
Fast reserve
| Name | Published Sort ascending |
|---|---|
| Fast Reserve Market Information Data Oct 2019 | 24 Oct 2019 |
| Fast Reserve Market Report October 2019 | 17 Oct 2019 |
| Fast Reserve Market Information Data November 2019 | 25 Sep 2019 |
| Fast Reserve Webex Sept 2019 | 25 Sep 2019 |
| Fast Reserve Market Information Report November 2019 | 25 Sep 2019 |
| Fast Reserve Market Report September 2019 | 17 Sep 2019 |
| FR Market Information Data October 2019 | 23 Aug 2019 |
| Fast Reserve Webex August 19 | 23 Aug 2019 |
| Fast Reserve Market Information Report October 2019 | 23 Aug 2019 |
| Fast Reserve Market Report August 2019 | 19 Aug 2019 |
FFR market information reports
| Name | Published Sort ascending |
|---|---|
| FFR Market Information Nov 2021 | 1 Nov 2021 |
| FFR Market Information Report Oct 2021 | 1 Oct 2021 |
| FFR Market Information Aug 2021 | 1 Aug 2021 |
| FFR Market Information Report Aug 2021 | 1 Aug 2021 |
| FFR Market Information Report Jul 2021 | 1 Jul 2021 |
| FFR Market Information July 2021 | 1 Jul 2021 |
| FFR Market Information June 2021 | 1 Jun 2021 |
| FFR Market Information Report Jun 2021 | 1 Jun 2021 |
| FFR Market Information Report May 2021 | 1 May 2021 |
| Frequency Response Products Market Information Report - June 2021 | 28 Apr 2021 |
FFR pre and post tender
| Name | Published Sort ascending |
|---|---|
| Post Tender Report - TR109 January 2019 | 17 Jan 2019 |
| Post Tender Report - TR108 December 2018 | 18 Dec 2018 |
| Post Tender Report - TR107 November 2018 EXT | 16 Nov 2018 |
| FRR tender update - Revised Post Tender Report TR107 - EXT | 6 Nov 2018 |
| Post Tender Report - TR106 October 2018 EXT revised 06.11.18 | 6 Nov 2018 |
| FFR Post Tender Report - TR106 October 2018 EXT | 16 Oct 2018 |
| FFR Post Tender Report TR105 -September 2018 EXT | 18 Sep 2018 |
| FFR Post Tender Report TR104 - August 18 - Ext | 16 Aug 2018 |
| FFR Post Tender Report TR103 - July - EXT | 17 Jul 2018 |
| FFR Post Tender Report TR102 - June - EXT | 18 Jun 2018 |