P399 – BSAD Identity Visibility

Formal title: Making the identity of Balancing Service providers visible in the Balancing Services Adjustment Data

Current Status

Initial Written Assessment
Assessment Procedure
Report Phase
With Authority
Awaiting Implementation


P399 seeks to include a new identifier field in the Balancing Services Adjustment Data (BSAD).

Currently, each Balancing Adjustment Action taken outside the Balancing Mechanism is reported with a unique sequential number. The Proposer contends that this does not identify the counterparty to the bilateral trade and creates an information advantage to those counterparties, reducing transparency in the operation of the system creating a barrier to effective competition.


This Modification was raised on Tuesday 24 December 2019 and the Initial Written Assessment was presented to the Panel on 16 January 2020. The first Workgroup was held on 27 January 2020 where two potential solutions were sent for impact assessment. These were assessed at the second Workgroup meeting, held on 27 March 2020. At this meeting National Grid ESO (NGESO) identified a potential solution that could significantly reduce lead times and costs of implementation. The Workgroup unanimously agreed that NGESO should impact assess this solution before moving forward. NGESO agreed and the Impact Assessment is due to be returned by 30 June 2020.

Next Events

The next Workgroup meeting is scheduled to be held on 17 July 2020. Please email [email protected] if you are interested in participating in the Workgroup for P399.


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