Removal of D0383 & D0384 requirements from Sharing MTDs process
Date of latest update
Type
Change
ID
R0328
Change Category
Other Industry Codes impacted
Change Path
Priority
Urgent
No
Latest Update
14/08/2026 - the consultation has opened, responses must be received by 23:59 07 September 2026.
Summary
Schedule 14 - Metering Operations currently holds obligations for a Meter Operator Agent (MOA) to send a D0383 ‘Notification of Commissioning Information’ to Electricity Suppliers, Distribution Network Operators (DNOs), Data Services and Data Collectors in certain process steps. The D0383 was not shared with these Parties in legacy arrangements, and there is no requirement for it to be sent to facilitate the MHHS arrangements. There are similar requirements to send the D0384 ‘Notification of Commissioning Status’ to these Parties, when it is only required by the Electricity Supplier. These requirements were introduced by the MHHS Design in error and need to be removed.
Impacted REC Documents
Impacted REC Parties and Market Participants
Status
Implementation Date
06 November 2026
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Proposed Solution Document
Document title
R0328 legal text V0.1
Archive
Off
Problem Statement
Schedule 14 - Metering Operations puts obligations on MOAs which are both not required and impossible to fulfil (as the Scenario Variants to send the D0383 from the MOA to the Electricity Supplier, DNO, Data Service and Data Collector do not exist). There are similar problems for the D0384, which is only required to be sent from the MOA to the Electricity Supplier.
Stages Selection
R0328 submission form
R0328 Change Report (Proposal Plan) v1.0 - approved 21.07.26
R0328 Change Report (For Consultation) V1.0 approved 12.08.26
Company Name
-
Review status
Review required
Provision of Standard industrial Classification (SIC) Code to REC Parties
Date of latest update
Type
Issue
ID
I0327
Priority
Urgent
No
Latest Update
22/05/2026 - Issue accepted in by Code Manager
Summary
As part of the planning required to deliver Net Zero, Gas Distribution Networks (GDNs) are obligated to plan Industrial and Commercial (I&C) gas demand at a more granular, site-specific level. To meet this obligation, access to Standard Industrial Classification (SIC) Code data, matched to both Gas and Electricity Meter Point Reference Numbers, would provide a significantly improved understanding of I&C customers.
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
I0327 submission form
Company Name
-
Review status
Review required
Erroneous Switch Review: Assurance Reporting Update
Date of latest update
Type
Issue
ID
I0326
Other Industry Codes impacted
Change Path
Priority
Urgent
No
Latest Update
07/07/2025 - Change Report (Proposal Plan) has been approved by the REC Change Panel.
Summary
There is gap in the Erroneous Switch (ES) Performance Assurance reporting as the DTN does not provide MPXN level data up front. It requires individual ES permission before MPXNs are provided. However, CSS reporting does provide monthly MPXN level report. As such end-to-end monitoring of the ES process cannot be carried out at a MPXN level.
Impacted REC Parties and Market Participants
Status
Status
Implementation Status
Date Raised
REC Decision Maker
Date of Update to Priority
Solution Development
Stages Selection
Stages Selection
I0326 submission form
I0326 Change Report (Proposal Plan) (Approved) v1.1 07.07.26
Company Name
-
Review status
Review required
C3-0160 STIRG Update
Date of latest update
Type
Change
ID
C3-0160
Urgent
No
Latest Update
-
Summary
The latest issue of the Service Termination Issues Reporting Guide (v4.3) contains errors. This is the latest version released recently at the end of February 2026 which introduced the new Asset Condition code C21. With this release, Defect Code B07 should have also been updated to include guidance on using C21 rather than reporting B07s when faced with situations regarding combined neutral earth connections. The latest release makes mention of the C21 code, but also still includes (now) incorrect guidance on aborting the job and reporting as a B07. Further to this, the Emergency Defect Code A05, whilst still listed at the top of the document in the table of codes, the actual A05 section with instructions on what to notice and how to report an A05 is now completely missing.
Status
Implementation Status
Date Raised
Date of Update to Priority
Stages Selection
Company Name
Code Manager (RPS)
Review status
Review required
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
Electricity Data Access Matrix V5.4
Date of latest update
Type
Change
ID
C3-0159
Urgent
No
Latest Update
-
Summary
The changes are to introduce a new category of Code Required Body to the Electricity DAM. The category is required to ensure that bodies that are required under a code have access to appropriate information
Status
Implementation Status
Date Raised
Date of Update to Priority
Stages Selection
Company Name
Code Manager (RPS)
Review status
Review required
Use of REL Data to Support Key Regulations
Date of latest update
Type
Issue
ID
I0324
Priority
Urgent
No
Latest Update
13/08/2026 - Currently under review by Code Manager.
Summary
The REC Electricity Enquiry Service (EES) Service Definition and Electricity Data Access Matrix (DAM) limits access of REL data to the Authority. This Issues seeks to extend access to the Code Manager and government departments in Great Britain to facilitate key government reporting and REC processes.
Impacted REC Documents
Impacted REC Services
Status
Status
Implementation Status
Date Raised
Date of Update to Priority
Solution Development
Stages Selection
Stages Selection
I0324 submission form
Company Name
-
Review status
Review required
Tariff Interoperability Phase 1a – Supplier Performance Assurance Requirements
Date of latest update
Type
Change
ID
R0323
Change Category
Change Path
Priority
Urgent
No
Latest Update
13/08/2026 - Consultation opened for responses until 23:59 on 07/09/2026
Summary
Obligations are being introduced into the REC to require Suppliers to make Tariff Pricing Data available to Tariff Interoperability Users (TI Users) using a new Tariff Interoperability Application Programming Interface (TI API). This proposal will provide Code Manager with data to assure supplier performance against obligations in a new REC Schedule: Tariff Interoperability Arrangements.
Impacted REC Parties and Market Participants
Status
Implementation Date
27 February 2027
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Stages Selection
SME
SME Role
Lead Technical Analyst
I0323 submission form
I0323 - REC Prioritisation Matrix
I0323 Change Report (Proposal Plan) Approved
R0323 Legal Drafting
I0323 Party IA Request
I0323 Consolidated Party IA Responses NON-CONFIDENTIAL
Company Name
-
Review status
Review required
Sharing Metering Asset Data V1.1 - MHHS Guidance
Date of latest update
Type
Change
ID
C3-0158
Urgent
No
Latest Update
-
Summary
An update to the Sharing Metering Asset Data document is proposed to enhance the guidance available to REC Parties, as follows: New paragraph on page 8, in the ‘Metering Related DIP Market Messages for MHHS Metering Points’ section: For Metering Points where the Metering Equipment is shared (for example, Associated Import / Export), when MTD or Energisation updates are required, the appointed MOA must update each impacted Metering Point individually by sending the required DIP Market Message.
Status
Implementation Status
Date Raised
Date of Update to Priority
Stages Selection
Company Name
Code Manager (RPS)
Review status
Review required
Erroneous Switch Review: I0237 Clarifications
Date of latest update
Type
Change
ID
R0322
Change Category
Change Path
Priority
Urgent
No
Latest Update
06/08/2026 - The Change Report (For Consultation) has been published and open for comments until 23:59 on 14/08/2026
Summary
The I0237 working group has carried out an end-to-end review of the Erroneous Switch process. The working group highlighted housekeeping changes and clarifications within Schedule 30 and the Market Messages.
Status
Implementation Date
06 November 2026
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Proposed Solution Document
Document title
Erroneous Switch Review - I0237 Clarifications (12.05.2026) V1.0
Archive
Off
Document title
R0322 Legal Drafting V1.1
Archive
Off
Problem Statement
The current Erroneous Switch drafting contains inconsistencies that can cause confusion and misunderstanding between Energy Suppliers regarding the applicable governance and process requirements, creating ambiguity around the correct contractual and operational framework. In addition, the I0237 Working Group has identified further required amendments to Schedule 30, highlighting that the existing drafting does not fully or accurately reflect intended process arrangements or correct terminology.
Stages Selection
SME
SME Role
Lead Technical Analyst
R0322 submission form
R0322 - Change Report (Proposal Plan) V1.0 (Approved) 19.05.2026
R0322 Consolidated IA Responses
Company Name
-
Review status
Review required