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_Jan_2018 V2 | 8 Mar 2018 |
| MBSS_DATA_JAN18 V2 | 8 Mar 2018 |
| MBSS_Jan_2018 | 2 Mar 2018 |
| MBSS_DATA_JAN18 | 2 Mar 2018 |
| MBSS_DATA_DEC17 | 2 Feb 2018 |
| MBSS_Dec_2017 | 2 Feb 2018 |
| MBSS_DATA_NOV2017 | 12 Jan 2018 |
| MBSS_Nov_2017 | 12 Jan 2018 |
| MBSS_DATA_OCT2017 | 1 Dec 2017 |
| MBSS_Oct_2017 | 1 Dec 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 |
|---|---|
| 2020-02-03 excel | 5 Feb 2020 |
| 2020-02-01 PDF | 5 Feb 2020 |
| 2020-01-29 pdf | 5 Feb 2020 |
| 2020-02-03 pdf | 5 Feb 2020 |
| 2020-02-02 Excel | 4 Feb 2020 |
| 2020-02-02 pdf | 4 Feb 2020 |
| 2020-01-30 excel | 3 Feb 2020 |
| 2020-01-31 EXCEL | 3 Feb 2020 |
| 2020-01-30 pdf | 3 Feb 2020 |
| 2020-01-31 PDF | 3 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 |
| TR32 and Runway Appendix - EXT | 7 Jul 2017 |
| STOR TR31 MIR - v2 | 6 Apr 2017 |
| TR31_MIR_tables_and_charts | 24 Mar 2017 |
| STOR TR31 MIR | 24 Mar 2017 |
Fast reserve
| Name | Published Sort ascending |
|---|---|
| Fast Reserve Market Information (April 2019) | 22 Feb 2019 |
| Fast Reserve Market Information (February 2019) | 12 Feb 2019 |
| Fast Reserve Post Assessment Webex January 2019 | 7 Feb 2019 |
| Fast Reserve Market Information Data (March 2019) | 25 Jan 2019 |
| Fast Reserve Market Information Report (March 2019) | 25 Jan 2019 |
| Fast Reserve Market Report January 2019 | 17 Jan 2019 |
| Fast Reserve Market Information Report (Feb - 19) | 18 Dec 2018 |
| Fast Reserve Market Report December 2018 | 17 Dec 2018 |
| Fast Reserve Post Assessment Webex November 18 | 21 Nov 2018 |
| Fast Reserve Market Report Data (January 2019) | 19 Nov 2018 |
FFR market information reports
| Name | Published Sort ascending |
|---|---|
| FFR Market Information Report- Dec 2020 | 27 Oct 2020 |
| FFR Market Information - Nov 2020- Table | 24 Sep 2020 |
| FFR Market Information Information - Nov 2020 | 24 Sep 2020 |
| FFR Market Information Report Oct 2020 Table | 25 Aug 2020 |
| FFR Market Information Report Oct 2020 | 25 Aug 2020 |
| FFR Market Information - Sept 2020 - Table | 24 Jul 2020 |
| FFR Market Information - Sept 2020 | 24 Jul 2020 |
| FFR Market Information - Aug 2020 - table | 25 Jun 2020 |
| FFR Market Information - Aug2020 | 25 Jun 2020 |
| FFR Market Information -July 2020 | 27 May 2020 |
FFR pre and post tender
| Name | Published Sort ascending |
|---|---|
| FFR Post Tender Report -APRIL 2017 -V3 EXT | 20 Apr 2017 |
| FFR Post Tender Report -APRIL 2017 -V2 EXT | 20 Apr 2017 |
| Post Tender Report MARCH 2017 EXT | 16 Mar 2017 |
| Post Tender Report FEBRUARY 2017 EXT | 16 Feb 2017 |
| Post Tender Report January 2017 - Amended EXT | 18 Jan 2017 |
| Post Tender Report January 2017 | 18 Jan 2017 |
| Post Tender Report December 2016 | 16 Dec 2016 |
| Post Assessment Tender Report Nov 2016 | 16 Nov 2016 |
| Post Assessment Tender Report Oct 2016 | 18 Oct 2016 |
| Post Assessment Tender Report Sept 2016 | 16 Sep 2016 |