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
Categorisation of Gas Address Amendment SDEP Cases
Date of latest update
Type
Issue
ID
I0305
Priority
Urgent
No
Latest Update
20/01/2026 - Issue accepted in by Code Manager
Summary
The Market Message PT0055 is specifically used for SDEP cases related to Gas Crossed Meter queries. We have identified a large number of cases requesting resolutions relating to Gas Address Amendments that are being raised in PT0055.
Impacted REC Documents
Impacted REC Services
Status
Status
Implementation Status
Date Raised
Date of Update to Priority
Solution Development
Stages Selection
Stages Selection
I0305 submission form
Company Name
-
Review status
Review required
Organisations with multiple role types EES and SDEP access
Date of latest update
Type
Change
ID
I0285
Change Category
Other Industry Codes impacted
Change Path
Priority
Urgent
No
Latest Update
01/09/2026 - the Party impact assessment has closed. The Code Manager is reviewing responses and conducting the business case assessment.
Summary
It is currently not possible for organisations with multiple role types to have the same person be able to access all assigned role types within the Secure Data Exchange Portal (SDEP) without having a unique email address for each role type.
Change Plan
Change Report (Proposal Plan) approved by Change Panel
Completed
Start:
Due:
Completion:
04 Nov 2025Impacted 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
Proposed Solution Document
Document title
Zip file with I0285 legal text
Archive
Off
Document title
I0285 Solution Development Report V1.0
Archive
Off
Problem Statement
Organisations with more than one role type are required to have unique email addresses for staff who require access to multiple role types, leading to inefficiencies, unnecessary administrative burdens and a poor user experience.
Stages Selection
SME
SME Role
Lead Technical Analyst
I0285 submission form
I0285 Change Report (Proposal Plan) V1.0 approved 04.11.25
I0285 Extension to Plan V1.0 approved 25.02.26
I0285 Extension to Plan V2.0 approved 24.06.26
Company Name
-
Review status
Review required
Non-Domestic Change of Occupier SDEP Screens (R0155 Solution)
Date of latest update
Type
Change
ID
R0232
Change Category
Change Path
Priority
Urgent
No
Latest Update
This Change Proposal was implemented as part of the 7 November 2025 REC Release.
Summary
This Issue has been raised to develop the dedicated Non-Domestic Change of Occupier SDEP screens that were not possible as part of R0155 – Change of Occupier: Evidentiary Standards and Timescales. Should this Issue progress with a developed solution, the new dedicated Non-Domestic Change of Occupier screens would replace the temporary work around provided as a temporary workaround in the R0155 solution.
Impacted REC Services
Impacted REC Parties and Market Participants
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
- The solution will be developed through the Change Issues Group. Attendees will be invited to discuss and determine the requirements for the dedicated Non-Domestic Change of Occupier SDEP screens (a separate screen will be required for both Gas and Electricity). The solution will also require reporting for Performance Assurance and will include a plan for queries raised at cut over and data retention obligations. To help drive those discussions a starting point could be as follows: • Meter Point X Number (MPxN) • Multi MPxN flag – i.e. are there more than one • Date of CoO • Number of attachments • Accept evidence - Y / N – only available to the receiving supplier • Additional info – must be populated if N Auto populate: • Date of creation, date of response. • The Service Level Agreement (SLA) is 10 Working Days so it will need the RAG status based on that. Escalations screens – as per the standard REC escalations – including MPxN, date of creation and number of attachments. As part of any solution, the Code Manager will also update the non-mandatory Non-Domestic Change of Occupier Guidance Document to include further details on the newly dedicated SDEP screens, as well as further training material for Energy Suppliers.
Problem Statement
Due to the MHHS Code Freeze, newly dedicated Non-Domestic Change of Occupier SDEP screens could not be implemented as part of the R0155 solution and instead the use of re-purposed, existing screens was proposed as a temporary workaround. Energy Suppliers were clear in their responses to the R0155 impact assessment and consultation that using a temporary work around (with the temporary solution being the use of existing screens PT0056 and PT0067) would create additional workload and risk and that newly dedicated SDEP screens for Non-Domestic Change of Occupiers would still be required.
Stages Selection
SME
SME Role
Lead Technical Analyst
I0232 - Non-Domestic Change of Occupier SDEP Screens (R0155 Solution) - Issue form
I0232 - Non-Domestic Change of Occupier SDEP Screens (R0155 Solution) - Change Report (Proposal Plan) V2.0 (17.06.2025)
I0232 - Non-Domestic Change of Occupier SDEP Screens (R0155 Solution) - Change Report (Impact Assessment) 13.03.2025
R0232 - Non-Domestic Change of Occupier SDEP Screens (R0155 Solution) - Change Report (For Consultation) 05.08.2025
I0232 - Consolidated Impact Assessment Responses (Non-Confidential) 08.04.2025
R0232 - Non-Confidential Consolidated Consultation Responses (02.09.2025)
R0232 - Change Report (Final Recommendation) V2.0 (Approved) 16.09.2025
SDEP User Training Deck v2.0
I0232 - Extension to Plan V1.0 (06.06.2025) Approved
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
DNOs notifying Suppliers about Crossed Meters
Date of latest update
Type
Change
ID
R0076
Priority
Urgent
No
Latest Update
28/05/2024 - R0076 has been withdrawn as the issue was addressed through R0121 - SDEP Review Improvements (1) - Process Types. The adoption window is closed.
Summary
The Change seeks to introduce a way for the DNOs to raise a crossed meter issue with the Supplier, in a way that directly feeds into the Supplier’s list of crossed meter issues. The supplier will be required to feed back progress to the DNO who has raised the issue with them, this should be defined as a process within the REC.
Impacted Consumers
Impacted REC Documents
Impacted REC Services
Impacted REC Parties and Market Participants
Status
Implementation Status
Date Raised
Fuel
Date of Update to Priority
Solution Development
Stages Selection
R0076 - Change Proposal Form v1.0
Company Name
-
Review status
Review required
Prepayment Credit Balance Transfer Process
Date of latest update
Type
Change
ID
R0037
Change Category
Other Industry Codes impacted
Priority
Urgent
No
Latest Update
04/08/2026 - On 04 August 2026, the REC Change Panel approved this Proposal Plan.
Summary
This Change Proposal seeks to develop an agile, efficient, Consumer-centric solution for the transfer of credit balance as part of a smart prepayment Switch.
Change Plan
Initial Analysis
Completed
Start:
10 Mar 2022Due:
30 Jun 2022Completion:
Present updated Change Proposal Plan to Change Panel
Completed
Start:
30 Jun 2022Due:
19 Jul 2022Completion:
Solution Development Complete
Completed
Start:
30 Jan 2023Due:
29 Feb 2024Completion:
29 Feb 2024Present Updated Change Proposal Plan to Change Panel
Completed
Start:
19 Jul 2022Due:
08 Nov 2022Completion:
Present Updated Plan to Change Panel
Completed
Start:
08 Nov 2022Due:
17 Jan 2023Completion:
17 Jan 2023Service Provider Impact Assessment
Completed
Start:
17 Jan 2023Due:
30 Jan 2023Completion:
30 Jan 2023Impacted 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
R0037 - Draft Legal Text v1.0
Archive
Off
Document title
R0037 - Solution Document v2.0
Archive
Off
Stages Selection
SME
SME Role
Lead Technical Analyst
SME User
beth.brown@capgemini.com
SME Role
Lead Assurance Analyst
SME User
vaishnsharma@deloitte.co.uk
R0037 - CP Form (Downloadable version)
R0037 Consolidated Party IA Responses PUBLIC v1.0
R0037 - Change Proposal Plan V6.0 (Approved) 05.03.24
R0037 - Initial Assessment Report v1.0 (Approved) 06.04.22
R0037 Consolidated RFI Responses PUBLIC v1.0
R0037 Change Report (Proposal Plan) Approved
Company Name
Utilita Energy Limited
Review status
Review required
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
Introduction of SDEP and EES User Maintenance API
Date of latest update
Type
Change
ID
R0009
Change Category
Change Path
Priority
Urgent
No
Latest Update
On the 24 August 2023, the Authority issued its decision to the REC Code Manager to reject an appeal raised
Summary
This Change Proposal is to introduce an Application Programming Interface (API) interface to allow: • SDEP Users to send/receive/respond automatically to messages through the Secure Data Exchange Portal (SDEP) • EES and Secure Data Exchange Service (SDES) Users to carry out automated Electricity Enquiry Service (EES) Authorised Person Maintenance
Change Plan
Initial Assessment Report published
Completed
Start:
08 Sep 2021Due:
25 Oct 2021Completion:
25 Oct 2021Analysis and Solution Development activity
Completed
Start:
25 Oct 2021Due:
15 Feb 2022Completion:
15 Feb 2022Service Provider Impact Assessment completion
Completed
Start:
15 Feb 2022Due:
04 Apr 2022Completion:
04 Apr 2022Preliminary Change Report issued
Completed
Start:
13 May 2022Due:
16 Dec 2022Completion:
16 Dec 2022Technical Expert Panel review
Completed
Start:
16 Dec 2022Due:
21 Dec 2022Completion:
21 Dec 2022Consultation Starts
Completed
Start:
21 Dec 2022Due:
23 Dec 2022Completion:
23 Dec 2022Consultation Ends
Completed
Start:
23 Dec 2022Due:
27 Jan 2023Completion:
27 Jan 2023Final Change Report issued
Completed
Start:
27 Jan 2023Due:
10 Feb 2023Completion:
10 Feb 2023Appeal Window Closure
Completed
Start:
22 Feb 2023Due:
15 Mar 2023Completion:
15 Mar 2023Party Impact Assessment Issued
Completed
Start:
04 Apr 2022Due:
13 May 2022Completion:
13 May 2022Technical Expert Panel review
Completed
Start:
10 Feb 2023Due:
22 Feb 2023Completion:
22 Feb 2023Impacted Consumers
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 to ensure the data held by my supplier and other industry parties is correct so that I receive accurate and timely bills so that I understand what I need to pay and by when with no surprises.
- As a consumer, I want to be able to switch my energy supply without experiencing significant delays whilst my new and old supplier resolve any issues. So that I can see the benefits of switching at the earliest opportunity.
- As an SDEP User, I want to be able to automate processes that use the SDEP, so I can meet my obligations as efficiently and effectively as possible. As an EES or SDES User, I want to be able to automate certain user maintenance requests, so I can manage user maintenance activities as efficiently as possible.
Proposed Solution Document
Document title
Draft Legal Text
Archive
Off
Problem Statement
It is not possible to automate the sending and receiving messages through the SDEP. It is also not possible to manage Authorised Person’s permissions in the EES and SDES in bulk where there is a high volume of changes required. This requires processes to be managed manually by an Authorised Person and doesn’t allow EES and SDES Users to identify more efficient ways of working.
Stages Selection
SME
SME Role
Lead Technical Analyst
SME User
beth.brown@capgemini.com
R0009 - Change Proposal Plan v4.0 (Approved)
R0009 - analysis summary conclusions v1.0
R0009 - Initial Assessment Report v1.0 (Approved)
R0009 - Requirements v1.0 - Used in Party IA
R0009 - Consolidated consultation responses v1.0
R0009 - Consolidated Impact Assessment Responses v1.0 GENERAL
Appendix 2 - R0009 Requirements
R0009 - Preliminary Change Report v1.0 (Decision deferred until 30/11/2022)
R0009 - Preliminary Change Report v3.0 (Approved)
R0009 - Final Change Report v2.0 (POST-VOTE) 01.03.2023
Authority R0009 appeal decision
Company Name
-
Review status
Review required