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)

Rich text

From 2nd March 2020, MBSS files will be published on our new NESO Data Portal.

Please see link below for the location:

https://data.nationalenergyso.com/balancing/mbss

Name Published
MBSS_May_2017 28 Jun 2017
MBSS_April_2017 1 Jun 2017
MBSS_DATA_APR17 1 Jun 2017
MBSS_DATA_MAR17 4 May 2017
MBSS_March_2017 4 May 2017
MBSS_DATA_FEB17 7 Apr 2017
MBSS_February_2017 7 Apr 2017
MBSS_DATA_JAN17 14 Mar 2017
MBSS_January_2017 V1 10 Mar 2017
MBSS_DATA_DEC16 21 Feb 2017

Past MBSS packs

Past MBSS packs

Rich text

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:

https://data.nationalenergyso.com/balancing/daily-balancing-cost-report-balancing-services-use-of-system

Name Published
2020-01-23 EXCEL 24 Jan 2020
2020-01-23 PDF 24 Jan 2020
2020-01-21 EXCEL 23 Jan 2020
2020-01-22 EXCEL 23 Jan 2020
2020-01-21 PDF 23 Jan 2020
2020-01-22 PDF 23 Jan 2020
2020-01-20 EXCEL 22 Jan 2020
2020-01-20 PDF 22 Jan 2020
2020-01-17 Excel 21 Jan 2020
2020-01-19 EXCEL 21 Jan 2020

Fast reserve

Name Published
Fast Reserve Market Report September 18 20 Sep 2018
Fast Reserve Market Information Data (October-18) 24 Aug 2018
Fast Reserve Market Information (October-18) 24 Aug 2018
Fast Reserve Market Report August 18 20 Aug 2018
Fast Reserve Market Information (September-18) 25 Jul 2018
Fast Reserve Market Information Data (September-18) 25 Jul 2018
Fast Reserve Post Assessment WebEx July-18 23 Jul 2018
Fast Reserve Post Assessment WebEx June-18 19 Jul 2018
Fast Reserve Market Report July 19 Jul 2018
Fast Reserve 2 week tender requirement 22 Jun 2018

FFR market information reports

Name Published
FFR Market Information Feb- 20 Table 17 Dec 2019
FFR Market Information Jan- 20 Table 26 Nov 2019
FFR Market Information Jan- 20 26 Nov 2019
FFR Market Information Dec-19 table 24 Oct 2019
FFR Market information Dec - 19 24 Oct 2019
FFR Market Information (Nov-19) Table 25 Sep 2019
FFR Market Information (Nov-19) 25 Sep 2019
FFR Market Information (Oct-19) 27 Aug 2019
FFR Market Information (Oct-19) Table 27 Aug 2019
FFR Market Information (Sept-19) Table 23 Jul 2019

FFR pre and post tender

Name Published
Post Assessment Tender Report October 2015 16 Oct 2015
Post Assessment Tender Report September 2015 15 Sep 2015
Post Assessment Tender Report August 2015 18 Aug 2015
Post Assessment Tender Report July 2015 16 Jul 2015
Post assessment Tender Report June 2015 Final 16 Jun 2015
Post assessment Tender Report May 2015 19 May 2015
Post Assessment Tender Report - April 2015 20 Apr 2015
Post Assessment Tender Report (Mar 15) 17 Mar 2015
Post Assessment Tender Report (Feb 15) 18 Feb 2015
Post Assessment Tender Report - (Dec 14) v2 30 Jan 2015