Post-MHHS Full Transition Complete (M15) REC updates
Date of latest update
Type
Issue
ID
I0325
Change Category
Other Industry Codes impacted
Change Path
Priority
Urgent
No
Latest Update
21/07/2026 - On 21 July 2026, the REC Change Panel voted to approve the Change Report (Proposal Plan) for I0325.
Summary
The REC was updated, primarily through R0209 and R0241, to add requirements that support the transition to, and enduring operation of the MHHS arrangements. As part of the transition, each impacted Metering Point will be migrated using processes defined in Codes, including the REC. Once this migration activity is complete, the legacy and transitional arrangements will become redundant and should be removed from the REC to support its efficient operation
Impacted REC Documents
Impacted REC Services
Impacted REC Parties and Market Participants
Status
Status
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Problem Statement
Retention of redundant obligations within the REC would make it more complex to navigate for Market Participants and could cause confusion on the obligations that are in effect to support the efficient operation of the Great British Energy retail market. It is also worth noting that until Ofgem formally closes the MHHS Significant Code Review (SCR), this REC Issue could potentially impact that SCR.
Stages Selection
Stages Selection
SME
SME Role
Lead Technical Analyst
SME Role
Lead Assurance Analyst
I0325 submission form
I0325 Scope list
Company Name
-
Review status
Review required
Provision of Half-Hourly Consumption Data for Advanced Meter Erroneous Switches
Date of latest update
Type
Change
ID
R0205
Change Category
Change Path
Priority
Urgent
No
Latest Update
This Change Proposal was implemented as part of the 7 November 2025 REC Release.
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.
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:
Impacted Consumers
Impacted REC Documents
Impacted REC Services
Status
Implementation Date
07 November 2025
| Included changes | Affected REC Items | |
|---|---|---|
| R0003 | Market-wide Half-Hourly Settlement Implementation |
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
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.
Proposed Solution Document
Document title
I0205 - Draft Legal Text (Schedule 30) - for Party Impact Assessment 10.06.2025
Archive
Off
Document title
I0205 - Draft Reporting Templates
Archive
Off
Document title
I0205 - Impact Assessment
Archive
Off
Document title
R0205 - Schedule 30 Legal Drafting 15.08.2025
Archive
Off
Document title
R0205 - Advanced Meter Half-Hourly Consumption Data Sharing Template
Archive
Off
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.
Stages Selection
I01205 - Change Proposal Form
I0205 - Change Report (Proposal Plan) V1.0 Approved (01.04.2025)
I0205 Consolidated Impact Assessment Responses V1.0 (Non-Confidential) 30.07.2025
R0205 - Consolidated Consultation Responses (09.09.2025)
R0205 Change Report (Final Recommendation) V2.0 (Approved) 16.09.2025
Company Name
Centrica
Review status
Review required
Access to SDES for Gas Networks
Date of latest update
Type
Change
ID
R0162
Change Category
Change Path
Priority
Urgent
No
Latest Update
21/10/2025 - the REC Change Panel approved the withdrawal of the proposal plan for R0162 and that this Change would be placed on hold while I0285 progresses.
Summary
Raising on behalf of the Gas Networks, who currently struggle to find who to email queries to within suppliers organisation. Suppliers and Electricity DNO's moved to SDES to ensure all communications were in a secure portal, with SLA's and for GDPR reasons, but Gas Networks do not have access to this portal, and not considered during the implementation of the system. They also obtain photo's when out on site to help resolve queries and would like somewhere to upload them to send to suppliers.
Impacted Consumers
Impacted REC Documents
Impacted REC Services
Impacted REC Parties and Market Participants
Status
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Proposed Solution Document
Document title
R0162 Solution Development Report V1.0
Archive
Off
Problem Statement
Energy Suppliers and Distribution Network Operators (DNOs) moved to SDES to ensure all communications were in a secure portal, with SLAs and for GDPR reasons. Gas Transporters do not have access to this portal, and were not considered during the implementation of the system. As such, communications are not being sent as securely as possible.
Stages Selection
SME
SME Role
Lead Technical Analyst
SME Role
Lead Assurance Analyst
CP Form Access to SDES for Gas Networks
R0162 Change Report (Proposal Plan) V1.0 Approved 15.04.2025
R0162 Consolidated Impact Assessment Responses v1.0
R0162 Extension to Plan V1.0 approved 27.08.25
R0162 Rebaseline Plan (withdrawal) V2.0 approved 21.10.25
Company Name
Octopus Energy
Review status
Review required
Schedule 17 - Secure Data Exchange 2.0
– Implemented on
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Resolution of Bilateral Erroneous Transfers
Date of latest update
Type
Change
ID
R0016
Change Category
Change Path
Priority
Urgent
No
Latest Update
16/05/2023 - At the Change Panel meeting on 02 May 2023, the recommendations set out in the SDEP Review Report were approved. This included the initiation of 6 Change Proposal groups, including a group that captures Multilateral Erroneous Switches and the functionality changes required within R0016. As a consequence Change Proposal R0016 - Resolution of Bilateral Erroneous Transfers has been withdrawn. The requirements identified under R0016 will be taken forward under a new SDEP review related Change Proposal.
Summary
This Change Proposal is to introduce a more consistent and efficient mechanism for Suppliers to use when investigating and resolving Bilateral Erroneous Transfers.
Change Plan
Solution Analysis
In Progress
Start:
18 Nov 2021Due:
21 Mar 2023Completion:
Proposed Approach Presented To Change Panel
Not Started
Start:
21 Mar 2023Due:
18 Apr 2023Completion:
Impacted Consumers
Impacted REC Documents
Impacted REC Services
Impacted REC Parties and Market Participants
Status
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Proposed solution summary
- As a Consumer, I want issues affecting me or my energy account to be resolved at the earliest opportunity, to minimise impacts to my energy switch or accurate and timely billing.
- As a Consumer, I want industry parties to share my personal data securely so that my data is protected.
- As an Energy Supplier, I want to be able to resolve Bilateral Erroneous Transfers effectively and efficiently, so that I can bill my Consumers accurately and timely.
- As an Energy Supplier, I want to be able to resolve Bilateral Erroneous Transfers effectively and efficiently, so that I supply Consumers with whom I have a valid contract.
Problem Statement
The SDEP currently only supports direct messaging between two SDEP Users and doesn’t allow for communications to be shared with multiple users (three or more). In circumstances where agreement is required between multiple parties, this needs to be managed outside of the SDEP by telephone and email. This has reportedly resulted in inconsistencies between parties and delays in the resolution process.
Stages Selection
R0016 Initial Assessment Report v1.0 (Approved)
R0016 Change Proposal Plan v6.0 (Approved)
Company Name
-
Review status
Review required
Missing Meter Technical Details
Date of latest update
Type
Change
ID
R0006
Change Category
Change Path
Priority
Urgent
No
Latest Update
08/07/2024 - R0006 has been withdrawn as the issue has been addressed under R0121 - SDEP Review Improvements - Process Types.
Summary
When a Switch occurs, with a concurrent change of Metering Equipment Manager (MEM), and the Meter Technical Details (MTD) are not received by the Gaining Supplier’s MEM, they are unable to provide them to the Gaining Supplier. Lack of MTDS can impact Consumers, Suppliers, and other industry Parties. The Change Proposer has highlighted that there is currently no defined escalation process available to Suppliers, enabling them to chase for missing MTDs following a Switch.
Change Plan
Initial Assessment Report published
Completed
Start:
08 Sep 2021Due:
12 Oct 2021Completion:
12 Oct 2021Change Panel review
Completed
Start:
12 Oct 2021Due:
19 Oct 2021Completion:
19 Oct 2021Updated Change Proposal Plan presented to Change Panel
Completed
Start:
19 Oct 2021Due:
04 Oct 2022Completion:
04 Oct 2022Solution Development
Completed
Start:
04 Oct 2022Due:
05 Oct 2022Completion:
08 Jan 2023Updated plan Presented to Change Panel
Completed
Start:
05 Oct 2022Due:
06 Dec 2022Completion:
06 Dec 2022Service Provider Impact Assessment
Missing Meter Technical Details > Change Plan
Start:
06 Dec 2022Due:
09 Jan 2023Completion:
Party Impact Assessment
Completed
Start:
09 Jan 2023Due:
03 Feb 2023Completion:
24 Feb 2023Preliminary Change Report Issued
Missing Meter Technical Details > Change Plan
Start:
03 Feb 2023Due:
28 Apr 2023Completion:
Responsible Committee Review
Missing Meter Technical Details > Change Plan
Start:
28 Apr 2023Due:
10 May 2023Completion:
Consultation Issued
Missing Meter Technical Details > Change Plan
Start:
10 May 2023Due:
12 May 2023Completion:
Final Change Report Issued
Missing Meter Technical Details > Change Plan
Start:
12 May 2023Due:
30 Jun 2023Completion:
Responsible Committee Decision
Missing Meter Technical Details > Change Plan
Start:
30 Jun 2023Due:
12 Jul 2023Completion:
Impacted Consumers
Impacted REC Documents
Impacted REC Services
Impacted REC Parties and Market Participants
Status
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Proposed solution summary
- As a Consumer: I want my new Supplier to set up my account in a timely manner, ensuring that I receive timely and accurate bills. I want to my meter to be read regularly to ensure I receive accurate bills I want to receive my final invoice from my old Supplier in a timely manner
- As a Losing Supplier I want to agree a closing meter reading to allow me to produce a final invoice and collect any outstanding payments
- As a Gaining Supplier I want to set up the energy account correctly for the consumer, receive an opening reading and produce a timely first invoice As a Gaining Supplier’s MEM I want to receive the MTD to enable me to update my data and trigger the necessary Market Messages to the new Supplier, new DC and DNO As a new Data Collector I want to receive the MTD to enable me to set up the correct meter reading schedule and collect meter readings.
Proposed Solution Document
Document title
R0006 - Solution Document v1.0
Archive
Off
Problem Statement
On a CoS the new MEM and Supplier need to receive the MTDs from the previous MEM to complete the setup of the customer’s account and billing records. Where MTD are not sent there is no dispute or escalation process to resolve this. This prevents the new Supplier from setting up the customer’s account and issuing a timely and accurate bill.
Stages Selection
SME
SME Role
Lead Technical Analyst
SME User
beth.brown@capgemini.com
R0006 - Change Proposal Plan v4.0 (Approved)
R0006 - Initial Assessment Report v1.0 (Approved)
Company Name
ScottishPower
Review status
Review required