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 |
|---|---|
| Historic Response BOAs by settlement period - 2015 onwards | 5 Nov 2018 |
| MBSS_September_2018 pdf | 30 Oct 2018 |
| MBSS_DATA_September_2018 Excel | 30 Oct 2018 |
| MBSS_DATA_August_2018 Excel | 2 Oct 2018 |
| MBSS_August_2018 pdf | 2 Oct 2018 |
| MBSS _DATA_July_2018 Excel | 30 Aug 2018 |
| MBSS_July_2018 pdf | 30 Aug 2018 |
| MBSS_June_2018 pdf | 1 Aug 2018 |
| MBSS_DATA_June_2018 Excel | 1 Aug 2018 |
| MBSS_May_2018 pdf | 11 Jul 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 |
|---|---|
| 2020-02-11 EXCEL | 13 Feb 2020 |
| 2020-02-12 EXCEL | 13 Feb 2020 |
| 2020-02-11 PDF | 13 Feb 2020 |
| 2020-02-12 PDF | 13 Feb 2020 |
| 2020-02-10 EXCEL | 12 Feb 2020 |
| 2020-02-10 PDF | 12 Feb 2020 |
| 2020-02-07 EXCEL | 11 Feb 2020 |
| 2020-02-08 excel | 11 Feb 2020 |
| 2020-02-09 Excel | 11 Feb 2020 |
| 2020-02-07 PDF | 11 Feb 2020 |
STOR
| Name | Published Sort ascending |
|---|---|
| TR28 STOR Runway Appendix | 10 Jul 2017 |
| STOR Annual Market Report 2014_2015 Data | 10 Jul 2017 |
| TR27_MIR_tables_and_charts_updated v_2 | 10 Jul 2017 |
| TR27 STOR Runway Appendix updated v_2 | 10 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 Fuel Type Analysis Summary (By Capacity) - Season 8_5 | 10 Jul 2017 |
Fast reserve
| Name | Published Sort ascending |
|---|---|
| Fast Reserve Market Information Report September 2019 | 24 Jul 2019 |
| Fast Reserve Market Information Data Sept 2019 | 24 Jul 2019 |
| Fast Reserve Webex July 2019 | 24 Jul 2019 |
| Fast Reserve Market Report July 2019 | 17 Jul 2019 |
| Fast Reserve Market Information Data August 2019 | 26 Jun 2019 |
| Fast Reserve Webex June 2019 | 26 Jun 2019 |
| Fast Reserve Market Information Report August 2019 | 26 Jun 2019 |
| Fast Reserve Market Report June 2019 | 18 Jun 2019 |
| Fast Reserve Market Information Report July 2019 | 24 May 2019 |
| Fast Reserve Webex May 2019 | 24 May 2019 |
FFR market information reports
FFR pre and post tender
| Name | Published Sort ascending |
|---|---|
| FFR Post Tender Report - May 2018 TR101- EXT | 17 May 2018 |
| FFR Post Tender Report - April 2018 TR100 - EXT | 18 Apr 2018 |
| FFR -Post Tender Report - March 2018 TR99 - EXT | 16 Mar 2018 |
| Post Tender report - February 2018 TR98 - EXT | 16 Feb 2018 |
| Post Tender Report-January 2018 - TR97 EXT | 17 Jan 2018 |
| Post Tender Report-December 2017 - EXT | 18 Dec 2017 |
| Post Tender Report-November 2017 - EXT | 16 Nov 2017 |
| Post Tender Report-October 2017 - EXT | 17 Oct 2017 |
| Post Tender Report-October 2017 - EXT amended | 17 Oct 2017 |
| Post Tender Report-September 2017 - EXT amended 29_09_2017 | 29 Sep 2017 |