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_SEP15 | 30 Oct 2015 |
| MBSS_September_2015 | 30 Oct 2015 |
| MBSS_DATA_AUG15 | 25 Sep 2015 |
| MBSS_August_2015 | 25 Sep 2015 |
| MBSS_July_2015 | 2 Sep 2015 |
| MBSS_DATA_JUL15 | 2 Sep 2015 |
| MBSS_June_2015 | 27 Jul 2015 |
| MBSS_DATA_JUN15 | 27 Jul 2015 |
| MBSS_APRIL_2015 | 20 Jul 2015 |
| MBSS_DATA_MAY15 | 20 Jul 2015 |
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 |
|---|---|
| 2020-01-03 Excel | 6 Jan 2020 |
| 2020-01-03 PDF | 6 Jan 2020 |
| 2020-01-02 Excel | 6 Jan 2020 |
| 2020-01-02 Pdf | 6 Jan 2020 |
| 2020-01-01 PDF | 3 Jan 2020 |
| 2020-01-01 Excel | 3 Jan 2020 |
| 2019-12-31 PDF | 3 Jan 2020 |
| 2019-12-31 Excel | 3 Jan 2020 |
| 2019-12-30 Excel | 2 Jan 2020 |
| 2019-12-30 pdf | 2 Jan 2020 |
STOR
Fast reserve
| Name | Published Sort ascending |
|---|---|
| 11_Market Report October 2017 | 19 Oct 2017 |
| FR Market Information (November 17) | 26 Sep 2017 |
| 11_Market Report Sept 2017_V2 | 22 Sep 2017 |
| FR Market Information (October 17) | 24 Aug 2017 |
| 1_Market Report Aug 2017 | 18 Aug 2017 |
| FR Market Information (September 17) | 26 Jul 2017 |
| 11_Market Report July 2017 | 20 Jul 2017 |
| FR Market Information (July 17) | 24 May 2017 |
FFR market information reports
| Name | Published Sort ascending |
|---|---|
| FFR Market Information (Jul-18) | 25 May 2018 |
| FFR Market Information (Jun-18) Table | 26 Apr 2018 |
| FFR Market Information (Jun-18) | 26 Apr 2018 |
| FFR Market Information (May 18) Table | 26 Mar 2018 |
| FFR Market Information (May-18) | 26 Mar 2018 |
| FFR Market Information (Apr 18) Table | 26 Feb 2018 |
| FFR Market Information (Apr-18) | 26 Feb 2018 |
| FFR Market Information (Mar 18) Table - Update | 30 Jan 2018 |
| FFR Market Information (Mar-18) - Update | 30 Jan 2018 |
| FFR Market Information (Mar 18) Table | 25 Jan 2018 |