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 June 2019 | 31 Jul 2019 |
| MBSS May 2019 | 30 Jun 2019 |
| MBSS Data May 2019 | 30 Jun 2019 |
| MBSS April 2019 V2 | 11 Jun 2019 |
| MBSS Data April 2019 V2 | 11 Jun 2019 |
| MBSS April 2019 pdf | 31 May 2019 |
| MBSS Data April 2019 Excel | 31 May 2019 |
| MBSS Data March 2019 excel | 7 May 2019 |
| MBSS March 2019 pdf | 2 May 2019 |
| Investor_Timeline | 29 Mar 2019 |
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 |
|---|---|
| 2020-02-22 EXCEL | 25 Feb 2020 |
| 2020-02-23 pdf | 25 Feb 2020 |
| 2020-02-21 PDF | 25 Feb 2020 |
| 2020-02-22 PDF | 25 Feb 2020 |
| 2020-02-20 EXCEL | 24 Feb 2020 |
| 2020-02-20 PDF | 24 Feb 2020 |
| 2020-02-16 EXCEL | 20 Feb 2020 |
| 2020-02-18 EXCEL | 20 Feb 2020 |
| 2020-02-19 EXCEL | 20 Feb 2020 |
| 2020-02-16 PDF | 20 Feb 2020 |
STOR
| Name | Published Sort ascending |
|---|---|
| TR34_MIR_tables_and_charts | 23 Mar 2018 |
| TR34 Results Appendix v2 | 6 Mar 2018 |
| TR34 Results Appendix | 23 Feb 2018 |
| STOR Annual Market Report 2016-2017 Data | 20 Dec 2017 |
| STOR Annual Report 2016-2017 | 20 Dec 2017 |
| TR33_MIR_tables_and_charts | 20 Oct 2017 |
| STOR TR33 MIR | 20 Oct 2017 |
| TR33 and Runway Appendix | 15 Sep 2017 |
| TR32_MIR_tables_and_charts | 28 Jul 2017 |
| STOR TR32 MIR | 28 Jul 2017 |
Fast reserve
| Name | Published Sort ascending |
|---|---|
| Fast Reserve Webex December 2019 | 20 Dec 2019 |
| Fast Reserve Market Information Report February 2020 | 20 Dec 2019 |
| Fast Reserve Market Report December 2019 | 17 Dec 2019 |
| Fast Reserve OCP Webinar December 2019 | 13 Dec 2019 |
| Fast Reserve Market Information Data December 2019 | 26 Nov 2019 |
| Fast Reserve Market Information Report January 2020 | 26 Nov 2019 |
| Fast Reserve Webex November 2019 | 22 Nov 2019 |
| Fast Reserve Market Report November 2019 | 19 Nov 2019 |
| Fast Reserve Webex November 2019 | 25 Oct 2019 |
| Fast Reserve Market Information Report December 2019 | 24 Oct 2019 |
FFR market information reports
| Name | Published Sort ascending |
|---|---|
| FFR Market Information Report May 2022v2 | 1 May 2022 |
| FFR Market Information Report Apr 2022 | 1 Apr 2022 |
| FFR Market Information Report Mar 2022 | 1 Mar 2022 |
| FFR Market Information Report Feb 2022v2 | 1 Feb 2022 |
| Response Requirements Update Feb 2022 | 1 Feb 2022 |
| FFR Market Information Report Jan 2022 | 1 Jan 2022 |
| FFR Market Information Report Dec 2021 | 1 Dec 2021 |
| FFR Market Information Report Dec 2021 | 1 Dec 2021 |
| FFR Market Information Report Nov 2021 | 1 Nov 2021 |
| FFR Market Information Report Nov 2021 | 1 Nov 2021 |
FFR pre and post tender
| Name | Published Sort ascending |
|---|---|
| Post Tender Report - TR117 September 2019 - EXT | 17 Sep 2019 |
| Post Tender Report - TR116 August 2019 -EXT | 16 Aug 2019 |
| Post Tender Report - TR115 July 2019 - EXT | 16 Jul 2019 |
| Post Tender Report - TR114 June 2019 - EXT | 18 Jun 2019 |
| Post Tender report - TR113 May 2019 - EXT | 16 May 2019 |
| Post Tender report - TR112 April 2019 - EXT | 16 Apr 2019 |
| Post Tender Report - TR111 March 2019 | 15 Mar 2019 |
| Post Tender Report - TR110 February 2019 | 14 Feb 2019 |
| FFR Tender Update - TR111 update | 14 Feb 2019 |
| Post Tender Report - TR108 December 2018 EXT - Amended 29.01.2019 | 29 Jan 2019 |