Metering Expert Panel Terms of Reference V1.3
Date of latest update
Type
Change
ID
C3-0151
Urgent
No
Latest Update
-
Summary
At its meeting in November 2025, the REC MEP asked the code manager to review the MEP Terms of Reference. The Code Manager presented its findings to the REC MEP meeting in December 2025 and agreed to take a change to the change Panel to put these changes into effect. This Change Proposal proposes an amendment for the voting structure for Proposal Plans only, and will be reviewed by the REC Change Panel for voting on 20 January 2026.
Status
Implementation Status
Date Raised
Date of Update to Priority
Stages Selection
Company Name
Code Manager (RPS)
Review status
Review required
Retail Risk Register V5.1
Date of latest update
Type
Change
ID
C3-0150
Urgent
No
Latest Update
-
Summary
PAB approved the following updates to the Retail Risk Register: - Revision of threshold for Risk Driver 12.3 following an investigation into the use of annulments. - Addition of Risk Driver 11.1 following the implementation of R0173 which introduces ISR ref to TDIS Reporting, allowing ETTOS leads to be matched to investigations.
Status
Implementation Status
Date Raised
Date of Update to Priority
Stages Selection
Company Name
Code Manager (RPA)
Review status
Review required
Provision of data to the GES Provider
Date of latest update
Type
Issue
ID
I0302
Change Category
Change Path
Priority
Urgent
No
Latest Update
26/08/2026 On 26 August 2026, in line with the Code Manager's recommendation, TEP approved the extension to plan for I0302.
Summary
RECCo has commenced work on developing a dual-fuel Enquiry Service which will involve the migration of data from its legacy services.
Status
Status
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Problem Statement
Ahead of the introduction of a dual-fuel Enquiry Service and in the case that the GES Provider is not the same entity as the CDSP and GRDA, this Issue seeks to enable the migration of gas data from legacy services into a new physical interface.
Stages Selection
Stages Selection
SME
SME Role
Lead Technical Analyst
SME Role
Lead Assurance Analyst
I0302 submission form
I0302 Change Report (Proposal Plan) v1.0
I0302 Change Report (Update to Plan) v1.0 Approved 15.04.26
I0302 Change Report (Extension to Plan) v1.0 Approved 26.08.2026
Company Name
-
Review status
Review required
Updates to Enquiry Service API endpoints to support migration to RECCo’s API Gateway
Date of latest update
Type
Issue
ID
I0301
Change Path
Urgent
No
Latest Update
28/04/2026 RECCo are currently conducting solution development activities on this REC Issue as part of their dual-fuel Enquiry Services project. Further updates to be expected upon progression of the project.
Summary
As part of RECCo’s plan to procure a dual-fuel Enquiry Service, there will be a single point of entry to API services. A migration plan has been developed with two independent stages. For stage one, all current Enquiry Service API users will need to connect through RECCo’s API Gateway rather than connecting directly to the existing EES and GES APIs. This will require users to amend the URLs they call when accessing the services.
Status
Status
Implementation Status
Date Raised
Fuel
Date of Update to Priority
Solution Development
Stages Selection
Stages Selection
I0301 submission form
Company Name
-
Review status
Review required
Meter Configuration Tables V2.0
Date of latest update
Type
Change
ID
C3-0149
Urgent
No
Latest Update
-
Summary
Following approval of BSC CP P503 Unfreezing MDD to enable load diversity - Elexon BSC, new versions of Market Domain Data (MDD) have been published on the Elexon Portal on 04 December. This Urgent modification temporarily unfroze certain MDD entities in order to apply new Standard Settlement Configuration (SSC) and Time Pattern Regime (TPR) combinations. The REC Meter Configuration Tables and the Market Domain Data are presently within a Change Freeze Period until the closure of the MHHS Transition Period and therefore must remain aligned. On 10 December, the RECMEP, as the responsible committee for changes to the REC Meter Configuration Tables, approved a change to update the REC Meter Configuration Tables to align with the P503 changes made under MDD
Status
Implementation Status
Date Raised
Date of Update to Priority
Stages Selection
Company Name
Code Manager (RTS)
Review status
Review required
Meter Manufacturers Make and Type not Populated in SMRS
Date of latest update
Type
Issue
ID
I0297
Other Industry Codes impacted
Change Path
Priority
Urgent
No
Latest Update
An Update to Plan has been approved by the REC Technical Expert Panel on 25 June 2026.
Summary
The Meter Manufacturers Make and Type (J0410 / DI-048) was not populated as part of the MHHS Programme's data cleanse. However it is part of the SMRS maintained Meter Technical Details (MTDs) for Smart Meters which replace the DTC MTD Market Messages for Smart Meters in the MHHS environment. It is not currently possible to populate this item in the legacy arrangements.
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
Following MHHS Migration, the MTDs provided by SMRS do not include the Meter Manufacturers Make and Type, as this replaces the existing D0149/D0150 Market Messages it could lead to the information being lost. This will mean Energy Suppliers and MOAs will not know the make and type of meter installed at a particular Site.
Stages Selection
Stages Selection
SME
SME Role
Lead Technical Analyst
SME Role
Lead Assurance Analyst
I0297 submission form
I0297 Change Report (Proposal Plan) V1.0
I0297 Update to plan
I0297 Legal Drafting
Company Name
-
Review status
Review required
Registration Id Required for MHHS Appointments
Date of latest update
Type
Issue
ID
I0296
Change Category
Other Industry Codes impacted
Change Path
Priority
Urgent
No
Latest Update
12/05/2026 - The Code Manager have developed a solution which has been live since 05 May 2026. More detail can be found on the REC Portal Wiki. A Closure Report has now been published, and this Issue has now been classed as resolved.
Summary
The RegistrationId (DI90043 / DI849) is required by SMRS to be included in the IF-031 'Supplier Agent Appointment Request' Market Message to allow the SMRA to process the appointment request. However not all Suppliers hold the RegistrationId for all Meter Points, in particular those that have not undergone a Registration managed by the Central Switching Service (CSS)
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 part of the solution for REC Issue I0296 - Registration Id Required for MHHS Appointments the REC Code Manager have developed a process to provide Energy Suppliers the Registration Id for Metering Points that have not been through a Central Switching Service (CSS) Registration Managed Switch. This is to allow Energy Suppliers that may not hold the Registration Id for these Metering Points to populate the Market-wide Half Hourly Settlement (MHHS) Agent Appointment Messages required to initiate a MHHS Migration.
- More detail of the solution can be found: https://recportal.co.uk/rec-wiki-mhhs/-/knowledge_base/market-wide-half-hourly-settlement/provision-of-registration-id-required-for-mhhs-appointments?utm_source=emailoctopus&utm_medium=email&utm_campaign=Weekly%20Bulletin%20-%202026-05-01
Proposed Solution Document
Document title
I0296 Closure Report_v1.0 (12 May 2026)
Archive
Off
Problem Statement
Not all Energy Suppliers hold the RegistrationId for all Meter Points, particularly those Meter Points that have not gone through a Switch, i.e. have not undergone a Registration managed by the CSS. The RegistrationId is currently only available where a Metering Point has been through a CSS managed Registration. Without the RegistrationId available to Energy Suppliers, not all Metering Points will be able to migrate putting the MHHS Migration and Milestone M15 at risk.
Stages Selection
Stages Selection
SME
SME Role
Lead Technical Analyst
SME Role
Lead Assurance Analyst
I0296 submission form
Company Name
-
Review status
Review required
Entry Assessment Forms
Date of latest update
Type
Change
ID
C3-0148
Urgent
No
Latest Update
-
Summary
The Entry Assessment Forms have been updated for their annual review, and includes changes directly addressing issues experienced with applicant submissions over the past year, such as common errors and potential ambiguities within the question sets. Additionally, Question 4.8 has been added to capture information that is shared as part of the MHHS QAD process for existing entrants but not new entrants, and a number of housekeeping updates have been made.
Status
Implementation Status
Date Raised
Date of Update to Priority
Stages Selection
Company Name
Code Manager (RPA)
Review status
Review required
REC Entry Assessment Information Pack
Date of latest update
Type
Change
ID
C3-0147
Urgent
No
Latest Update
-
Summary
The Entry Assessment Information Pack has been updated for its annual review, and includes changes that incorporate recent industry MHHS (Market-Wide Half-Hourly Settlement) updates as well as housekeeping changes.
Status
Implementation Status
Date Raised
Date of Update to Priority
Stages Selection
Company Name
Code Manager (RPA)
Review status
Review required
MHHS D0300 Issue
Date of latest update
Type
Issue
ID
I0295
Urgent
No
Latest Update
09/04/2026 - The Proposer has withdrawn the Issue following conversations with the Code Manager. The Proposer concluded that it would be more appropriate for MHHS migration to complete before undertaking a comprehensive review of the overall process.
Summary
D0300s for MHHS do not include register reads. Block 60C says: “For MHHS Metering Points, this Data Item should be populated with details of the cumulative register for Smart Metering Assets”. If a smart meter is non-comms, and we receive a cumulative only in the D0300, but are billing to register reads, we don't know whether the disputed read is valid based on our read history. Furthermore, a cumulative will not always equal the sum of the register reads for smart meters.
Status
Status
Implementation Status
Date Raised
Date of Update to Priority
Solution Development
Stages Selection
Stages Selection
I0295 Submission Form
Company Name
-
Review status
Review required