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_Sep_2017 V2 | 27 Oct 2017 |
| MBSS_DATA_SEP17 | 26 Oct 2017 |
| MBSS_Sep_2017 | 26 Oct 2017 |
| MBSS_Aug_2017 | 29 Sep 2017 |
| MBSS_DATA_AUG17 | 29 Sep 2017 |
| MBSS_DATA_JUL17 | 1 Sep 2017 |
| MBSS_Jul_2017 | 1 Sep 2017 |
| MBSS_DATA_JUN17 | 7 Aug 2017 |
| MBSS_Jun_2017 | 7 Aug 2017 |
| MBSS_DATA_MAY17 | 28 Jun 2017 |
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 |
|---|---|
| 2020-01-27 Excel | 31 Jan 2020 |
| 2020-01-27 pdf | 31 Jan 2020 |
| 2020-01-28 excel | 30 Jan 2020 |
| 2020-01-28 pdf | 30 Jan 2020 |
| 2020-01-25 Excel | 28 Jan 2020 |
| 2020-01-26 Excel | 28 Jan 2020 |
| 2020-01-26 pdf | 28 Jan 2020 |
| 2020-01-25 pdf | 28 Jan 2020 |
| 2020-01-24 EXCEL | 27 Jan 2020 |
| 2020-01-24 PDF | 27 Jan 2020 |
STOR
| Name | Published Sort ascending |
|---|---|
| TR31 and Runway Appendix | 24 Feb 2017 |
| TR30_MIR_tables_and_charts - v2 | 3 Nov 2016 |
| STOR TR30 MIR - v3 | 3 Nov 2016 |
| STOR TR30 MIR | 31 Oct 2016 |
| TR30_MIR_tables_and_charts | 30 Oct 2016 |
| STOR TR30 MIR - v2 | 18 Oct 2016 |
| TR30 STOR Runway Appendix | 30 Sep 2016 |
| TR30 Appendix | 30 Sep 2016 |
| TR29_MIR_tables_and_charts v2 | 15 Aug 2016 |
| STOR TR29 MIR v1 | 18 Jul 2016 |
Fast reserve
| Name | Published Sort ascending |
|---|---|
| Fast Reserve Market Information (January 2019) | 19 Nov 2018 |
| Fast Reserve Market Report November 2018 | 16 Nov 2018 |
| Fast Reserve Post Assessment Webex September 18 | 9 Nov 2018 |
| Fast Reserve Market Information Data (December 2018) | 22 Oct 2018 |
| Fast Reserve Market Information Report (December 2018) | 22 Oct 2018 |
| Fast Reserve Market Report October 2018 | 18 Oct 2018 |
| Fast Reserve Market Report September 18 v2 | 28 Sep 2018 |
| Fast Reserve Market Information Report (November 2018) | 26 Sep 2018 |
| Fast Reserve Market Information Data (November 2018) | 26 Sep 2018 |
| Fast Reserve Post Assessment Webex August 18 | 24 Sep 2018 |
FFR market information reports
| Name | Published Sort ascending |
|---|---|
| FFR Market information - July 2020- table | 27 May 2020 |
| FFR Market Information - June 2020 | 28 Apr 2020 |
| FFR Market Information - June 2020 - table | 28 Apr 2020 |
| FFR Market Information - May 20 | 25 Mar 2020 |
| FFR Market Information - May 20 Table | 25 Mar 2020 |
| FFR Market Information Apr-20 Table | 27 Feb 2020 |
| FFR Market Information - Apr 20 | 27 Feb 2020 |
| FFR Market Information Mar -20 | 24 Jan 2020 |
| FFR Market Information Mar -20 Table | 24 Jan 2020 |
| FFR Market Information Feb- 20 | 17 Dec 2019 |
FFR pre and post tender
| Name | Published Sort ascending |
|---|---|
| Post Assessment Tender Market Report Aug 2016 | 16 Aug 2016 |
| Post Assessment Tender Report July 2016 | 18 Jul 2016 |
| FFR Post Tender Assessment Report | 16 Jun 2016 |
| Post Assessment Tender Report May 2016 | 18 May 2016 |
| Post Assessment Tender Report April 2016 | 18 Apr 2016 |
| Post Assessment Tender Report March 2016 | 16 Mar 2016 |
| Post Assessment Tender Report Feb 2016 | 16 Feb 2016 |
| Post Assessment Tender Report Jan 16(1) | 22 Jan 2016 |
| Post Assessment Tender Report Dec 2015 | 23 Dec 2015 |
| Post Assessment Tender Report November 2015 | 17 Nov 2015 |