P344 IWG 4: Virtual Lead Party processes

This industry working group is developing the processes and the associated Code Subsidiary Documents (CSDs) changes required to implement two requirements of the P344 ‘Project TERRE’ solution:

  • The lead Party of a SBMU shall be required to submit Half Hourly Delivered Volumes for each MSID Pair Notified to Settlement
  • SVAA shall allocate MSID Pair Delivered Volumes between the composite MSID Pairs to create Metering System Delivered Volume

Current status

Diagram showing Assessment as the current stage

Latest update

The first working group was held on 19 July 2018 alongside IWG2. ELEXON is developing the CSD changes, which will be consulted on in September 2018.

Documents Impacted

  • NEW BSCP602 – this new BSCP that will be created by the IWG
  • NEW BSCP602 – this new BSCP that will be created by the IWG
  • BSCP508
  • SAA Service Description
  • SVAA Service Description
  • SVAA User Requirements Specification
  • SAA User Requirements Specification
  • Simple Guides
  • Guidance Notes

Background to P344 ‘Project TERRE’

P344 ‘Project TERRE’ seeks to align the Balancing and Settlement Code with the European Balancing Project TERRE (Trans European Replacement Reserves Exchange) requirements. This will allow the implementation of the TERRE balancing product at national level and ensure compliance with the European Electricity Balancing Guideline (EBGL).

The BSC Panel has recommended to the Authority (at its 14 June 2018 meeting) that it approve the P344 Alternative Modification (mandatory sharing of Half Hourly (HH) delivered volumes with the customer’s Supplier) and reject the Proposed Modification (customer consent required for sharing HH delivered volumes with the customer’s Supplier).

The Authority is expected to make a decision by 31 July 2018. If approved the Modification will be implemented on 28 February 2019 (February 2019 BSC Release).

ELEXON’s technical solutions

  • Foundation programme

About other IWGs

This IWG is part of a collection of groups that will focus on the implementation of Project TERRE and its impact on the UK electricity industry.


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