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_May_2018 Excel | 11 Jul 2018 |
| MBSS_April_2018 pdf | 15 Jun 2018 |
| MBSS_DATA_April_2018 Excel | 15 Jun 2018 |
| MBSS_DATA_MAR18 | 9 May 2018 |
| MBSS March 2018 | 4 May 2018 |
| Procurement guidelines report 2017-18 | 30 Apr 2018 |
| MBSS_Feb_2018 | 29 Mar 2018 |
| MBSS_DATA_FEB18 | 29 Mar 2018 |
| MBSS_November_2016 V3 | 12 Mar 2018 |
| MBSS_APRIL_2016 V2 | 12 Mar 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 |
|---|---|
| 2020-02-08 pdf | 11 Feb 2020 |
| 2020-02-09 pdf | 11 Feb 2020 |
| 2020-02-06 EXCEL | 7 Feb 2020 |
| 2020-02-06 PDF | 7 Feb 2020 |
| 2020-02-04 EXCEL | 6 Feb 2020 |
| 2020-02-05 excel | 6 Feb 2020 |
| 2020-02-04 PDF | 6 Feb 2020 |
| 2020-02-05 pdf | 6 Feb 2020 |
| 2020-02-03 excel | 5 Feb 2020 |
| 2020-02-01 EXCEL | 5 Feb 2020 |
STOR
| Name | Published Sort ascending |
|---|---|
| STOR Market Information for TR25 - Appendix | 10 Jul 2017 |
| STOR Fuel Type Analysis Summary (By Capacity) - Season 8_5 | 10 Jul 2017 |
| STOR Markert Information for TR24_Amended | 10 Jul 2017 |
| STOR Market Information for TR23 - Appendix(1) | 10 Jul 2017 |
| STOR Market Information for TR23 - Appendix | 10 Jul 2017 |
| STOR End of Year Report 2012_13 | 10 Jul 2017 |
| TR28_MIR_tables_and_charts_V_3 | 10 Jul 2017 |
| STOR TR28 MIR V_2 | 10 Jul 2017 |
| STOR TR28 MIR | 10 Jul 2017 |
| TR 28 Appendix | 10 Jul 2017 |
Fast reserve
| Name | Published Sort ascending |
|---|---|
| Fast Reserve Market Information Data July 2019 | 24 May 2019 |
| Fast Reserve Market Report May 2019 | 20 May 2019 |
| Fast Reserve Market Information Data (June 19) - v2 | 25 Apr 2019 |
| Fast Reserve Market Information Report (June 19) | 25 Apr 2019 |
| Fast Reserve Webex April 2019 | 24 Apr 2019 |
| Fast Reserve Market Report (April 2019) | 18 Apr 2019 |
| Fast Reserve Market Information Report (May 19) | 26 Mar 2019 |
| Fast Reserve Market Information Data (May 19) | 26 Mar 2019 |
| Fast Reserve Market Report (March 2019) | 6 Mar 2019 |
| Fast Reserve Webex February 2019 | 6 Mar 2019 |
FFR market information reports
| Name | Published Sort ascending |
|---|---|
| FFR Market Information Report Feb 2021 Data | 1 Feb 2021 |
| Frequency Response Products MIR Feb 2021 | 1 Feb 2021 |
| FFR Market Information Report - March 2021- table | 27 Jan 2021 |
| Frequency Response Products Market Information Report - March 2021 | 27 Jan 2021 |
| FFR Market Information Report Jan 2021 Data | 1 Jan 2021 |
| FFR Market Information- February 2021- table | 21 Dec 2020 |
| Frequency Response Products Market Information Report - February 2021 | 21 Dec 2020 |
| FFR Market Information- Jan 2021- Table | 25 Nov 2020 |
| FFR Market Information- Jan 2021 | 25 Nov 2020 |
| FFR Market Information Report -Dec 2020- table | 27 Oct 2020 |
FFR pre and post tender
| Name | Published Sort ascending |
|---|---|
| Industry Clarification Letter | 29 Sep 2017 |
| Post Tender Report-September 2017 - EXT | 19 Sep 2017 |
| Post Tender Report-September 2017 - EXT amended 19.09.2017 | 19 Sep 2017 |
| Post Tender Report- August 17- EXT | 16 Aug 2017 |
| Post tender Report - July 2017- EXT amended 25.07.17 | 25 Jul 2017 |
| Post Tender Report - June 2017 - EXT Amended 21.07.17 | 25 Jul 2017 |
| Post tender Report - July 2017- EXT | 18 Jul 2017 |
| Post Tender Report - June 2017 - EXT Amended 13.07.17 | 18 Jul 2017 |
| Post Tender Report - June 2017 - EXT | 16 Jun 2017 |
| FFR Post Tender Report -MAY 2017 -EXT | 17 May 2017 |