D0303 flow following MHHS design changes
Date of latest update
Type
Issue
ID
I0230
Other Industry Codes impacted
Change Path
Priority
Urgent
No
Latest Update
29/04/2026 - This Issue has been withdrawn by the Proposer, as there was not a strong preference amongst MAPs of which temporary solution option (if any) should be progressed. Many MAPs already have workarounds in place, and a permanent solution is expected to be progressed in the future through a joint REC / BSC change. The adoption window has closed.
Summary
As part of Market Wide Half Hourly Settlement (MHHS) design, the requirement to provide Data Item Effective from Settlement Date {REGI} (J0049 / DI50025) in the Notification of Meter Operator, Supplier and Metering Assets installed / removed by the MOP to the MAP Market Message (D0303 / MM00240) has been changed from mandatory to optional. This means Meter Asset Providers (MAP) may not receive it.
Change Plan
Change Report (Proposal Plan) approved at Change Panel
Completed
Start:
Due:
Completion:
04 Nov 2025Impacted REC Parties and Market Participants
Status
Status
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Problem Statement
The Effective from Settlement Date {REGI} Data Item being optional rather than mandatory inside the Notification of Meter Operator, Supplier and Metering Assets installed / removed by the MOP to the MAP Market Message means that MAPs may not receive this information required for billing purposes.
Stages Selection
Stages Selection
SME
SME Role
Lead Technical Analyst
Issue Proposal Form
I0230 Change Report (Proposal Plan) V1.0 approved 04.11.25
I0230 and I0261 Solution Development Report V1.0
I0230 I0261 Q&A session V1.0
I0230 and I0261 Consolidated IR Responses PUBLIC V1.0
Company Name
-
Review status
Review required
Reconciliation of Unallocatable Transactions Review
Date of latest update
Type
Change
ID
R0223
Change Category
Change Path
Priority
Urgent
No
Latest Update
22/09/25 - This Change Proposal has been implemented as part of the MHHS M8 22 September 2025 REC Release.
Summary
The process for Reconciliation of Unallocatable Transactions is set out in Section 10 of Schedule 11. During the most recent reconciliation delivery (the gas process from July 2024) several areas of improvement were identified, critically a lack of clarity regarding historic Supplier Licences and how to include or exclude them from the calculations. The Code Manager believes that this lack of clarity and past precedent would lead to material impact on one or more Party.
Change Plan
Findings from Information Request were presented at Change Issues Group
Completed
Start:
Due:
Completion:
06 Feb 2025Impacted REC Documents
Impacted REC Parties and Market Participants
Status
Implementation Date
MHHS Programme Milestone M8 (Code changes delivered)
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Proposed solution summary
- A review of the process with specific regard to: - Clarity within the process regarding historic Supplier Licences - Alignment between fuels - Re-introducing an independent audit.
Proposed Solution Document
Document title
Schedule 11 - Prepayment Arrangements (I0223 - Party Impact Assessment) 05.06.2025
Archive
Off
Document title
Extract - Schedule 11 - Prepayment Arrangements (I0223 - Party Impact Assessment) 05.06.2025
Archive
Off
Document title
Schedule 11 - Prepayment Arrangements (R0223 - Consultation) 24.07.2025
Archive
Off
Document title
Extract - Schedule 11 - Prepayment Arrangements (R0223 - Consultation) 24.07.2025
Archive
Off
Document title
Schedule 11 - Prepayment Arrangements (R0223 - Final Recommendation) 18.08.2025
Archive
Off
Document title
Extract - Schedule 11 - Prepayment Arrangements (R0223 - Final Recommendation) 18.08.2025
Archive
Off
Problem Statement
During the most recent reconciliation delivery (the gas process from July 2024) several areas of improvement were identified, critically a lack of clarity regarding historic Supplier Licences and how to include or exclude them from the calculations.
Stages Selection
SME
SME Role
Lead Technical Analyst
SME Role
Lead Assurance Analyst
SME User
vaishnsharma@deloitte.co.uk
I0223 - Submission Form
I0223 - Information Request Responses
I0223 - Change Report (Proposal Plan) V2.0 (Approved) 20.05.2025
I0223 - Proposal Plan Update V1.0 (Approved) 20.05.2025
I0223 - Change Report (Impact Assessment) V1.0 (06.06.2025)
I0223 - Party Impact Assessment Consolidated Responses V1.0 (11.07.2025)
R0223 - Change Report (For Consultation) V1.0 (24.07.2025)
R0223 - Change Report (Final Recommendation) V2.0 (Approved) 02.09.2025
Company Name
-
Review status
Review required
Stranded RMPs in Defunct Suppliers
Date of latest update
Type
Issue
ID
I0219
Other Industry Codes impacted
Change Path
Priority
Urgent
No
Latest Update
27/02/2025 - Change is now not being merged into any other changes and will proceed as a standalone change. A potential solution has been identified, but will be discussed for potential cross code impacts
Summary
Currently within Schedule 23 a Registration can only be undertaken on RMPs with an Operational or Dormant RMP Status, and not Terminated. Terminated is a status that the RMP is set to when the Meter Point Status is no longer operational or the site is isolated. It is right that these sites are not able to be Registered as there is a risk that Suppliers could inadvertently Register such Meter Points. We do have instances where such sites are stranded in defunct Supplier portfolios - and the Supplier no longer has the capability to take the relevant action to Deactivate the Registrations. This may because the operational staff have left and the business is in administration.
Change Plan
Discussed at Technical Change Workshop
Completed
Start:
Due:
Completion:
25 Feb 2025Impacted Consumers
Impacted REC Documents
Impacted REC Services
Impacted REC Parties and Market Participants
Status
Status
Implementation Status
Date Raised
Fuel
Date of Update to Priority
Solution Development
Stages Selection
Stages Selection
SME
SME Role
Lead Technical Analyst
SME User
maxime.van-eyseren@capgemini.com
SME Role
Lead Assurance Analyst
SME User
amoden@deloitte.co.uk
Issue Proposal Form
Company Name
Xoserve
Review status
Review required
Introducing Third Party Intermediary (energy broker) assurance and accreditation (Alternate)
Date of latest update
Type
Change
ID
R0137A
Change Category
Urgent
No
Latest Update
16/05/2025 - the Authority have published their decision to reject R0137 and R0137A.
Summary
This change seeks to expand the obligation for Energy Suppliers to only work with TPIs who are adhering to principles as set out in the REC TPI Code of Practice to all Non-Domestic Consumers. It also looks to reduce the burden on Energy Suppliers having to perform their own audits by introducing a REC Services Accreditation Scheme and allowing companies to qualify as an Industry-Recognised Accreditation Body.
Impacted Consumers
Impacted REC Documents
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
Legal Text R0137A Consultation
Archive
Off
Document title
Legal Text for R0137A - Final
Archive
Off
Problem Statement
Non-Domestic Consumers have more limited protections than Domestic and Microbusiness Consumers in the energy market, and so may not always experience best practice from all parties they interact with. The aim is to expand these protections while limiting the audit burdens on Suppliers and TPIs.
Stages Selection
SME
SME Role
Lead Assurance Analyst
SME User
amoden@deloitte.co.uk
R0137A Change Proposal Form
Authority decision on REC modification proposal R0137 and R0137A
Company Name
REC Code Manager
Review status
Review required
Creation of a Mechanism to Allow Third Parties to Report Objection Activity
Date of latest update
Type
Issue
ID
I0213
Change Category
Change Path
Priority
Urgent
No
Latest Update
15/07/2025 - The Code Manager has rejected Issue I0213. This Issue has been deemed out of scope of the REC and has been rejected following a legal review. This decision was ratified by the REC Change Panel at their meeting on 15 July 2025.
Summary
Presently only industry parties can raise the matter of non-compliant or unwarranted objections activity that a supplier may be participating in. This Issues has been raised to request RECCo to consider accepting notice and evidence (that can be acted upon) from qualifying 'non industry' parties, from third party consultants and brokers.
Change Plan
Proposal Plan Approved at REC Change Panel
Completed
Start:
Due:
Completion:
06 May 2025Impacted Consumers
Impacted REC Documents
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 summary
- I0213 has been raised with a suggestion that the Code Manager should consider accepting notice and evidence from qualifying non-industry Parties, including Third Party consultants and brokers (Third Party Intermediaries (TPIs)). A possible solution for this may include a new submission page, or form, on the REC Portal, that would allow Third Parties to submit evidence of non-compliant Objection activity.
Problem Statement
There is currently not a method for Third Parties, who may be involved in the Switching process, to report non-compliant Objection activity. Non-Compliant Objection activity can result in time consuming procedures for Consumers, creating unnecessary engagement with Energy Suppliers, and may result in a financial burden.
Stages Selection
Stages Selection
I0213 - Change Proposal Form
I0213 - Change Report (Proposal Plan) 25.04.2025 (Approved)
I0213 - Solution Development Report (for Party impact assessment) V1.0 (16.05.2025)
I0213 Consolidated Impact Assessment Responses V1.0 (Non-Confidential) 07.07.2025
Company Name
Energy Consultants Association
Review status
Review required
Sequence order of CSS00200 message
Date of latest update
Type
Issue
ID
I0204
Urgent
No
Latest Update
08/11/2024 - The Proposer has withdrawn this issue as it is being progressed under MHHS CR056. The adoption window has now closed. * This is Issue relates to the Market-wide Half Hourly Settlement design.
Summary
Empty
Impacted Consumers
Impacted REC Documents
Impacted REC Services
Impacted REC Parties and Market Participants
Status
Status
Implementation Status
Date Raised
Date of Update to Priority
Solution Development
Stages Selection
Stages Selection
Company Name
St.Clements
Review status
Review required
Review of the REC's Address Management Service
Date of latest update
Type
Issue
ID
I0200
Change Category
Change Path
Priority
Urgent
No
Latest Update
13/05/2026 - The REC Code Manager is establishing a new REC working group to support the progression of I0200 – Review of the REC’s Address Management Service. If you would like to attend the I0200 Working Group, please register your interest by contacting the Code Manager at change.management@recmanager.co.uk. The first meeting will take place in June 2026, with the exact date and time to be confirmed in due course and communicated via the REC Change Bulletin and via email to all those who register their interest.
Summary
Having the incorrect address can lead to a range of Consumer issues, including switching, billing and meter reading problems. The Meter Point Location (MPL) and Retail Energy Location (REL) have been added to the Code to resolve this issue. Whilst there had been progress resolving address data issues, there is not currently a mechanism to establish Code level targets for address improvement, resulting in around 2.8 million unmatched addresses.
Impacted Consumers
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
There has been progress resolving address data issues, but there is no mechanism to clearly establish Code level targets for address improvement, or overall market performance.
Stages Selection
Stages Selection
SME
SME Role
Lead Assurance Analyst
SME User
amoden@deloitte.co.uk
I0200 - Improving Address Management Targets (Issue Form)
I0200 - Change Issues Group paper
I0200 - Change Report (Proposal Plan) V1.1 (Approved) 18.02.2025
I0200 - Update to Plan (Pre Approval) 14.04.2026
Company Name
REC Code Manager
Review status
Review required
Review of Metering Asset data transferred from MAMs to the CDSP
Date of latest update
Type
Issue
ID
I0196
Other Industry Codes impacted
Change Path
Priority
Urgent
No
Latest Update
02/09/2026 - Update to plan published ahead of review at the REC Metering Expert Panel on 09 September 2026.
Summary
It has emerged that a high proportion of gas Data Items contain mismatches when comparing between Metering Asset Managers (MAM), Gas Suppliers, and the Central Data Service Provider. This Issue seeks to explore this issue and identify mechanisms by which these mismatches may be resolved.
Impacted Consumers
Impacted REC Documents
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
Work conducted by RPA has identified a significant number of mismatches between gas Data Items held by key stakeholders. This may result in Consumer detriment, as information relevant to an MPRN may not be held accurately by any given Party. As such, there is a need to review processes pertaining to the communication of gas data by MAMs onward to the CDSP to mitigate the potential for mismatches.
Stages Selection
Stages Selection
SME
SME Role
Lead Technical Analyst
SME Role
Lead Assurance Analyst
SME User
vaishnsharma@deloitte.co.uk
I0196 Issue Proposal Form (Word)
I0196 Issue Proposal Form (PDF)
I0196 Change Report (Plan) (Approved) V2.0 07.05.25
I0196 Change Re-Plan (Approved) V1.0 02.05.25
Company Name
-
Review status
Review required
Introducing a Process to Provide Updates During Fault Resolutions
Date of latest update
Type
Issue
ID
I0197
Change Category
Other Industry Codes impacted
Priority
Urgent
No
Latest Update
10/06/2026 - The Code Manager, following an approval to an Update to Plan by the REC Metering Expert Panel, has placed I0197 on hold.
Summary
Some customers have had faulty meters for a prolonged period, which impacts billing and settlement, and can prevent customers accessing specific tariffs. Currently the REC only has obligations relating to electricity meter faults, and these do not actually require work to be done to address faults. This issues proposes the introduction a maximum timeframe Fault Resolution deadline to resolve issues around faulty meters.
Impacted Consumers
Impacted REC Documents
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
Consumers have had faulty meters for a prolonged period, which impacts billing and settlement, and can prevent customers accessing specific tariffs.
Stages Selection
Stages Selection
SME
SME Role
Lead Assurance Analyst
SME User
vaishnsharma@deloitte.co.uk
I0197 - Change Proposal Form
I0197 - Change Report (Proposal Plan) V1.0 (Approved) 03.06.2025
I0197 - Update to Plan V3.0 (On Hold) 03.06.2026
Company Name
-
Review status
Review required
Metering Asset Manager (MAM) Communication Method Register
Date of latest update
Type
Change
ID
R0198
Change Category
Other Industry Codes impacted
Change Path
Priority
Urgent
No
Latest Update
This Change Proposal has been implemented as part of the February 2026 REC Release.
Summary
Studies conducted by the REC Performance Assurance (RPA) function of the REC Code Manager have concluded that gas market data fidelity may be improved by reducing the frequency of missed messages between Metering Asset Managers and other REC Parties. This Issue seeks to explore mechanisms by which a reduction in the number of permissible communication methods used by MAMs could support the data quality improvement objective.
Impacted Consumers
Impacted REC Documents
Impacted REC Services
Impacted REC Parties and Market Participants
Status
Implementation Date
27 February 2026
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Proposed Solution Document
Document title
I0198 - Draft Schedule 14 - Metering Operations & Draft Communications Method Register
Archive
Off
Document title
R0198 - Draft Schedule 14 - Metering Operations & Draft Communications Method Register V2.0
Archive
Off
Problem Statement
MAMs communicate with each other, and with other parties, using up to three possible methods as they send Market Messages in line with their obligations in the REC. It has been suggested that moving to a single communication method might help mitigate gas data quality issues. This Issue seeks to explore an interim solution to facilitate this.
Stages Selection
SME
SME Role
Lead Assurance Analyst
SME User
beth.brown@capgemini.com
SME Role
Lead Assurance Analyst
SME User
vaishnsharma@deloitte.co.uk
I0198 Change Proposal (pdf)
I0198 Change Report (Plan) (Approved) V2.0 03.04.2
I0198 Change Proposal Re-Plan V1.0 28.03.25
I0198 Change Report (IA) V1.0 03.04.25
R0198 Consolidated IA Responses V1.0 Non-Confidential
R0198 Change Report (Consultation) V1.0 11.06.25
R0198 Change Proposal Re-Plan V2.0 02.07.25
Change Report (Consultation) V2.0 11.07.25
R0198 Consolidated Consultation Responses V1.0 06.08.25
R0198 Change Report (Final Recommendation: Pre-Vote) V1.1 13.08.25
R0198 Change Report (Final Reccomendation - Post-Vote) V1.0 13.08.25
Company Name
-
Review status
Review required