P428 ‘Correction to P376 Legal Text’

Formal title: P428: Correction to P376 Legal Text

This Modification is required to correct an error contained within the approved legal drafting for P376. This Proposal will ensure that Virtual Lead Parties (VLPs) do not need to submit the status of Metering System Identifier (MSID) pairs contained within secondary Balancing Mechanism (BM) Units that do not use the baselining methodology introduced in the P376 solution.

Under the current approved P376 solution, VLPs with BM Units that have not been registered as a ‘Baselined BM Unit’ would be required to specify the ‘Inactive’ status of a non-baselined BM Unit. It is Elexon’s view that this new requirement was not intended, is expected to increase both system development costs associated with P376 as well as on-going operational costs for VLPs. This current requirement is not necessary, adds no value and does not better facilitate any of the Applicable BSC Objectives. The Proposer of P376 agrees that allowing non-baselined BM Units would cause a problem and suggested disallowing this functionality.


Listen to a podcast from lead analyst Chris Arnold which summarises the proposal.

Current Status

Assessment Procedure
Report Phase
Awaiting Implementation


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