Provision of Half-Hourly Consumption Data for Advanced Meter Erroneous Switches
Summary
As part of the MHHS REC code change activity, a change has been made to REC Schedule 30 to remove the half hourly meter exemption from the Erroneous Transfer provisions. Whilst this is necessary from an MHHS perspective with all sites becoming half hourly settled, the application of ET obligations in the Advanced Meter segment creates some additional challenges. To be able to accurately bill an Advanced Meter site, following repatriation of that customer to their correct supplier after an ET has been raised / agreed, the supplier needs to have access to half hourly consumption data for the ET period when they were not the registered supplier. With ETs potentially taking up to 2 years to be identified and resolved, the only place that the supplier could reliably source that HH consumption data would be from the other (losing) supplier.
Latest update and next planned activity
Date of latest update
Latest Update
This Change Proposal was implemented as part of the 7 November 2025 REC Release.
Impacts Overview
Impacted Consumers
Electricity
Non-Domestic
Impacted REC Documents
Schedule 17 - Secure Data Exchange
Schedule 30 - Resolution of Consumer Facing Switching and Billing Issues
Impacted REC Services
Electricity Enquiry Service (EES)
Secure Data Exchange Service (SDES)
Priority and rationale
Standard
Priority last updated on 29 May 2026
Change Reports, Impact Assessments, Consultations and Documents
Change Reports
07 Nov 2025
Solution development
Problem Statement
In the absence of having Half-Hourly consumption data for Erroneously Switched Consumers, Energy Suppliers are currently required to estimate consumption for billing purposes that can lead to inaccurate billing.
Proposed solution summary
- An approval of this Issue/Change Proposal would see an obligation placed upon the Losing Supplier, following a successful Erroneous Switch repatriation, to provide the Gaining Supplier with the Half-Hourly consumption data for the period in which they were erroneously supplying the meter.
- Half-Hourly consumption data would be providing to the Gaining Supplier, from the Losing Supplier, via SDEP using an Excel template within 5 Working Days of the Erroneous Switch repatriation switch date. The Gaining Supplier would be required to provide 48 Half-Hourly consumption intervals for each that the the Consumer was supplied by the erroneously Gaining Supplier.
No documents available.
Change Plan
Change Proposal Plan to REC Change Panel
Provision of Half-Hourly Consumption Data for Advanced Meter Erroneous Switches > Change Plan
Start:
22 Aug 2024Due:
01 Apr 2025Completion:
01 Apr 2025Discussion at REC Change Issues Group
Provision of Half-Hourly Consumption Data for Advanced Meter Erroneous Switches > Change Plan
Start:
01 Apr 2025Due:
05 Jun 2025Completion:
Original submission
Change details
Ben Atkinson - Centrica
22 Aug 2024
Change details
Provision of HH consumption data for Advanced Meter ETs
As part of the MHHS REC code change activity, a change has been made to REC Schedule 30 to remove the half hourly meter exemption from the Erroneous Transfer provisions. Whilst this is necessary from an MHHS perspective with all sites becoming half hourly settled, the application of ET obligations in the Advanced Meter segment creates some additional challenges.
To be able to accurately bill an Advanced Meter site, following repatriation of that customer to their correct supplier after an ET has been raised / agreed, the supplier needs to have access to half hourly consumption data for the ET period when they were not the registered supplier. With ETs potentially taking up to 2 years to be identified and resolved, the only place that the supplier could reliably source that HH consumption data would be from the other (losing) supplier.
To be able to accurately bill an Advanced Meter site, following repatriation of that customer to their correct supplier after an ET has been raised / agreed, the supplier needs to have access to half hourly consumption data for the ET period when they were not the registered supplier. With ETs potentially taking up to 2 years to be identified and resolved, the only place that the supplier could reliably source that HH consumption data would be from the other (losing) supplier.
In the absence of having HH consumption data for these erroneously transferred customers, suppliers would be required to estimate consumption for billing purposes which will lead to inaccurate billing.
Approval of this CP would see an obligation placed upon losing suppliers, following successful ET repatriation, to provide the gaining supplier with HH consumption data for the period during which they were erroneously supplying the meter.
We would propose that the HH consumption data is provided via SDEP using the attached excel template within 5 working days of the ET repatriation switch date, providing 48 HH consumption intervals for each day that the customer was supplied by the erroneously gaining supplier.
We would propose that the HH consumption data is provided via SDEP using the attached excel template within 5 working days of the ET repatriation switch date, providing 48 HH consumption intervals for each day that the customer was supplied by the erroneously gaining supplier.
We have explored the availability of retrieving this data via the DIP message replay capability, but that does not extend back far enough to cover the potential billing period for ETs.
We are also engaging separately with Elexon to understand if this data could be provided in the future via their Kinnect Insight platform APIs. Subject to ongoing discussion and future development, it’s possible that this could provide an enduring solution, but not at MHHS go-live or potentially until the service had accrued sufficient consumption history.
We are also engaging separately with Elexon to understand if this data could be provided in the future via their Kinnect Insight platform APIs. Subject to ongoing discussion and future development, it’s possible that this could provide an enduring solution, but not at MHHS go-live or potentially until the service had accrued sufficient consumption history.
Impacts
Electricity, Microbusiness, Small and Medium Enterprise (SME), Industrial and Commercial (I&C)
Switching experience, Billing accuracy, Trust and confidence
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Schedule 17 - Secure Data Exchange, Schedule 30 - Resolution of Consumer Facing Switching and Billing Issues
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No details provided
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No details provided
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Standards Definition
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No details provided
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Secure Data Exchange Service
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No details provided
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No details provided
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Yes
No details provided
Priority & timing
No
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NA
NA
No details provided
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Activity
Proposed solution summary changed to An approval of this Issue/Change Proposal would see an obligation placed upon the Losing Supplier, following a successful Erroneous Switch repatriation, to provide the Gaining Supplier with the Half-Hourly consum…
Proposed solution summary changed to An approval of this Issue/Change Proposal would see an obligation placed upon the Losing Supplier, following a successful Erroneous Switch repatriation, to provide the Gaining Supplier with the Half-Hourly consumption data for the period in which they were erroneously supplying the meter.Half-Hourly consumption data would be providing to the Gaining Supplier, from the Losing Supplier, via SDEP using an Excel template within 5 Working Days of the Erroneous Switch repatriation switch date. The Gaining Supplier would be required to provide 48 Half-Hourly consumption intervals for each that the the Consumer was supplied by the erroneously Gaining Supplier..
Show moreStatus has been changed to Implemented.
Change Report - Draft Change Report has been updated to I0205 - Change Report (Impact Assessment) V1.0 (Pre-Approval) 10.06.2025.pdf.
Change report - Final Change Report has been updated to R0205 - Change Report (For Consultation) V1.0.pdf.
Implementation Date has been updated to 07 Nov 2025.
james.hardy has been allocated as Lead Analyst.