P388 ‘Aligning the P344 and P354 Solutions’

Formal title: 'Aligning the P344 and P354 Solutions'

Current Status

Initial Written Assessment
Assessment Procedure
Report Phase
With Authority
Awaiting Implementation


A number of opportunities to simplify and align the P344 ‘Project TERRE’ and P354 ‘Use of ABSVD for non-BM Balancing Services at the metered (MPAN) level’ legal text have been identified. The process for allocating MSID Pair Delivered Volumes to composite MSIDs will be updated to account for both Virtual Lead Party and NETSO inputs. The P344 and P354 processes surrounding the Supplier Volume Allocation Metering System Balancing Services Register will be aligned and simplified.


P388 was implemented on 1 April 2020.



The Draft Modification Report was presented to Panel for decision on 8 August 2019. The Panel unanimously approved the P388 Draft Modification Report under Self-Governance. 

The Report Phase Consultation closed on 30 July 2019. Two respondents raised concerns that P388 does not take into account balancing actions being provided for regional DNO services, such as voltage support.

The P388 Initial Written Assessment was presented to the BSC Panel on 11 July 2019.

P388 was raised by NETSO on 3 July 2019.

Next Events

P388 was implemented on 1 April 2020 so there are no further events.


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