C9 statements and consultations

We are required to establish statements and guidelines in accordance with special condition C9 of the statements of the NESO licence. On this page you will find all C9-related documents, including consultations.  

Please note: as a result of the licence changes arising from the transition to NESO, the statements previously found under C16 of the transmission licence are now found under C9. The statements on this page currently refer to C16 as this was the correct licence condition at the time of consultation

Wind turbines on a frosty and foggy morning

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Current statements and guidelines

Here you can find the latest versions of C9-related statements including the Balancing Principles Statement Report and guidelines.

Latest versions

Previous statements and guidelines

Here you can find previous versions of C9-related statements and guidelines.

Procurement Guidelines

Balancing services adjustment data (BSAD)

System management action flagging

Applicable balancing services volume data (ABSVD)

Balancing Principles Statement

C9 Consultations

On an annual basis, we undertake consultations in respect of the C9 statements. Where applicable we may be required to undertake additional consultations outside of the standard annual review.

Past C9 consultations

Name Published
Relevant Balancing Services (RBS) Guidelines v2 effective from 1 April 2023 - for early consultation 18 Nov 2022
C16 and Relevant Balancing Services (RBS) Industry Workshop November 2022 10 Nov 2022
Final Tracked Changes BSAD Methodology Statement October 2022 - Final Report 19 Oct 2022
Final Tracked Changes SMAF Methodology Statement October 2022 - Final Report 19 Oct 2022
Final Tracked Changes Procurement Guidelines Statement v22 October 2022 - Final Report 19 Oct 2022
Final Tracked Changes BSAD Statement v21 October 2022 - Final Report 19 Oct 2022
Winter Contingency Services C16 Report to Authority October 2022 19 Oct 2022
Final Tracked Changes ABSVD Statement October 2022 - Final Report 19 Oct 2022
Final Tracked Changes Balancing Principles Statement October 2022 - Final Report 19 Oct 2022
Demand Flexibility Service C16 Report to Authority October 2022 19 Oct 2022

2020-21

2018-19

2017 ABSVD Informal

2010-11

2009-10

Name Published
TRACC paper 18 Oct 2017
Consultation - P217A and Review 18 Oct 2017
Consultation Report - BSAD and SMAF 18 Oct 2017
SMAF - Appendix D 18 Oct 2017
C16 Authority Report - Appendix G 18 Oct 2017
C16 PG Appendix B - 'cat 5' 18 Oct 2017
C16 Consultation document - 16 January 2009 (1) 18 Oct 2017
Appendix E BPS plus plain english changes 18 Oct 2017
Appendix G - SMAF P217A and Review changes 18 Oct 2017
C16 Appendix F BPS plus plain english changes 18 Oct 2017
NTC commercial compensation methodology consultation

These documents outline the GB methodology for commercial arrangements for payments relating to interconnector (IC) capacity restrictions resulting from NTC restrictions set by National Energy System Operator (NESO). The commercial arrangements in these documents should be applied to:

  • all interconnector projects (existing and future) that are connected to the GB transmission system
  • capacity calculations made both before and after the firmness deadline

This methodology should be applied in full to ensure consistency of NTC arrangements across all GB connected interconnectors.

NTC consultation documents