REC Issues Group, 14/11/2025. addressed the challenge of converting Meter Technical Details (MTDs) from the D0268 data flow when a metering point reverts to Non-Half Hourly (NHH) status after previously operating in the MHHS Segment. This scenario arises during market migrations and requires clear guidance to ensure accurate data handling and settlement.
Development of REC Guidance: The group agreed that new REC guidance will be developed to support parties in correctly populating NHH market messages, specifically D0149 (‘Notification of Mapping Details’), D0150 (‘Traditional Meter Technical Details’), and D0313 (‘Auxiliary Meter Technical Details’).
Communication Mechanism: The use of the D0142 data flow was suggested as an effective method for communicating the downgrade from Advanced to NHH arrangements to the Meter Operator Agent (MOA).
Settlement Risks: Risks to settlement were identified, particularly if the incoming MOA is unable to interrogate the meter and obtain necessary technical details. This could impact the accuracy of settlement and data integrity.
Stakeholder Feedback: Feedback from stakeholders was actively sought and will be incorporated into the updated guidance to ensure practical applicability and address real-world scenarios.
Next Steps:
- Finalise and publish updated guidance reflecting stakeholder input.
- Monitor implementation and address any further issues arising from the migration process.