REC Data Specification Clarifications
Date of latest update
Type
Change
ID
R0266
Change Category
Change Path
Priority
Urgent
No
Latest Update
07/04/2026 - the REC Change Panel voted to approve this Change Proposal for implementation on 06 November 2026. The appeal window has closed.
Summary
This issue has been raised to improve the clarity of elements of the Energy Market Data Specification (EMDS) that are ambiguous due to information from the pre-REC Data Transfer Catalogue (DTC) Annex C and gas RGMA Annex B being omitted in the transition to REC.
Change Plan
Change Report (Proposal Plan) approved by Change Panel
Completed
Start:
Due:
Completion:
19 Aug 2025Status
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
I0266 Party IA documents for gas
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Document title
R0266 consultation documents for gas
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Document title
R0266 final solution documents for gas
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Document title
I0266 Party IA documents for electricity
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Document title
R0266 final solution documents for electricity
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Problem Statement
There may be a lack of clarity for Parties populating Market Messages / Data Flows as not all of the additional rules, conditions and examples from Annex B and Annex C transitioned into the REC (or to another industry code).
Stages Selection
Workgroup
Workgroup(s)
I0266 REC Data Specification Clarifications Submission Form
I0266 Change Report (Proposal Plan) V1.0
I0266 Consolidated Impact Assessment Responses V1.0
I0266 Extension to Plan V1.0 approved 10.12.25
R0266 Change Report (For Consultation) V1.0
R0266 Consolidated Consultation Responses PUBLIC V1.0
R0266 Change Report (Final Recommendation) V1.0 approved 07.04.26
Company Name
-
Review status
Review required
Theft Calculator Usage and Suitability Assessment
Date of latest update
Type
Issue
ID
I0265
Change Category
Information Request
Change Path
Priority
Urgent
No
Latest Update
06/05/2026 - The Change Report (Extension to Plan) was approved at Change Panel on 05 May 2026. Solution Requirements are under development.
Summary
Currently, it is uncertain how widely the existing Theft Assessment Calculators are being used by Parties for assessing energy losses due to theft, despite Schedules 7 & 8 mandating the usage. There is evidence to suggest inconsistent application across Parties, and whilst there has only been one derogation request, anecdotal feedback indicates that other Parties are also struggling to use the calculator.
Status
Status
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Proposed solution summary
- It is expected that there will be a collaborative information gathering exercise to thoroughly assess the current Theft Calculator. This includes collecting data on specific use cases, frequency of use, and devices (such as laptops or mobile devices), evaluating whether its current functionalities align with industry needs for assessing energy theft and TDIS submissions, and reviewing the suitability of its current platform to identify preferred future delivery mechanisms (e.g. web or app-based). This approach aims to inform potential enhancements or a comprehensive upgrade, ensuring a consistent and reliable tool that can be accessed and used effectively across multiple operational scenarios and devices for the benefit of all Parties.
Problem Statement
The current lack of clarity around the usage, effectiveness, and suitability of the energy theft calculator is leading to inconsistent assessments and reporting across the industry. This ambiguity hinders the identification and sharing of best practices, creates an uneven playing field among Parties, and may result in inconsistent outcomes for consumers. Additionally, it limits the tool’s potential to support robust, court-ready evidence ahead of the Energy Theft Unit (ETU) and Referral Assessment Service (RAS) launch. A lack of transparency may also discourage Parties from raising concerns, further impeding improvement and compliance.
Stages Selection
Stages Selection
SME
SME Role
Lead Technical Analyst
SME User
maxime.van-eyseren@capgemini.com
SME Role
Lead Assurance Analyst
SME User
vaishnsharma@deloitte.co.uk
I0265 submission form
I0265_ Change Report (Extension to Plan) V1.0
I0265 Consolidated Information Request Network Responses PUBLIC
Company Name
-
Review status
Review required
Housekeeping June 2025
Date of latest update
Type
Change
ID
R0258
Change Category
Change Path
Priority
Urgent
No
Latest Update
This Change Proposal has been implemented as part of the REC Release on 27 June 2025.
Summary
The code manager has identified a number of non-material clarifications, typographical errors and changes needed to REC products.
Status
Implementation Date
27 June 2025
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Problem Statement
This Housekeeping Change Proposal seeks to make typographical and formatting corrections that have been identified and improve consistency across the REC.
Stages Selection
R0258 Legal text - REDLINED
R0258 Housekeeping Change Report
Company Name
-
Review status
Review required
Change to REC for Data processing outside of EEA
Date of latest update
Type
Change
ID
R0257
Change Category
Change Path
Priority
Urgent
No
Latest Update
This Change Proposal was implemented as part of the 7 November 2025 REC Release.
Summary
There is an added layer of authorisation to the processing of data outside of the European Economic Area (EEA) which provides no value to the process. The issue is specifically around 20.8) point a) which requires REC Board Approval prior to any processing.
Impacted REC Documents
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 Document
Document title
I0257 Legal drafting (27/05/2025)
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Document title
R0257 Legal drafting
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Problem Statement
This Issue was raised by RECCo’s Data Protection Officer who noted that the addition of the extra layer of approval delays the process for Parties in processing this data, and it does not align with similar changes for the Balancing and Settlement Code (BSC), where board approval is not required.
Stages Selection
Proposal Form
I0257 Change Report (Proposal Plan) Approved 03/06/2025
R0257 Change Report (For Consultation)
R0257 Consolidated Consultation Responses
R0257 Change Report (Final Recommendation) (Approved) 05.08.2025
Company Name
-
Review status
Review required
Non-Domestic Change of Occupier Reporting (R0155 Solution)
Date of latest update
Type
Change
ID
R0254
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 R0155 change process, the REC Performance Assurance Board requested ongoing monitoring reporting to identify outliers or anomalous behaviour which the Code Manager would then follow up in detail. However, this planned reporting by Energy Suppliers was descoped from R0155 due to the ongoing development of an Ofgem Reporting Request for Information (titled Non-Domestic Market Monitoring Request for Information). The Ofgem RFI includes data received from Energy Suppliers on the time taken for a Non-Domestic Consumer’s request, and to simplify the process for Energy Suppliers, REC Performance Assurance intend on using the same data. This reduces the need to make two related, but different reports in the same topic areas. The Code Manager intended to use the reporting from the Ofgem RFI for ongoing Performance Assurance monitoring of the Non-Domestic Change of Occupier process. However, this was not confirmed by Ofgem in time for the R0155 implementation, as such a separate REC Change Proposal is required to include this data as part of the ongoing Performance Assurance monitoring.
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
- Incorporating the Ofgem Reporting RFI Non-Domestic Change of Occupier data into the Performance Assurance Reporting Catalogue
- Development of a process to agree data sharing between Ofgem and the REC Code Manager to share allow Ofgem to share the Non-Domestic Change of Occupier data directly with the Code Manager to reduce the burden on Energy Suppliers and save them from having to duplicate submissions
Proposed Solution Document
Document title
Ofgem Non Domestic Market Monitoring RFI template (CoO/CoT Extract) 03.06.2025
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Document title
Copy of PARC V5.15 (23.09.2025)
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Off
Problem Statement
The planned reporting by Energy Suppliers was descoped from R0155 due to the ongoing development of an Ofgem Reporting Request for Information (titled Non-Domestic Market Monitoring Request for Information). Without the Ofgem RFI data being submitted, or an alternative means of receiving or reporting Non-Domestic Change of Occupier data, REC Performance Assurance are unable to complete the ongoing monitoring activity originally requested by the Performance Assurance Board during the R0155 change process.
Stages Selection
Issue Form (Non-Domestic Change of Occupier Reporting).docx
Extract from Ofgem RFI Guidance_March_2025.docx
2025.08 Non Domestic Market Monitoring RFI template 2025 for suppliers
I0254 - Change Report (Proposal Plan) V1.1 (Approved) 03.06.2025
I0254 - Change Report (Impact Assessment) V1.0 03.06.2025
I0254 - Consolidated Party Impact Assessment Responses V1.0 (01.07.2025)
R0254 - Consolidated Consultation Responses (Non-Confidential) V1.0 (18.09.2025)
Company Name
-
Review status
Review required
Theft - DNO/Networks not providing photos
Date of latest update
Type
Change
ID
R0253
Change Category
Change Path
Priority
Urgent
No
Latest Update
17/03/26 - The appeal window has closed. No appeal was raised, and the Change will therefore be released in November 2026.
Summary
This Change seeks to introduce an obligation for a Network Party attending sites with suspected or actual Energy Theft to take photographs of the tampered Metering Asset, to be made available to the Energy Supplier upon request.
Impacted REC Documents
Status
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
I0253 Draft Legal Text (Schedule 8) V1.0 14.10.25
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Document title
R0253 Draft Legal Text (Schedule 8) V2.0 13.01.26
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Off
Document title
R0253 Draft Legal Text (Schedule 8) V3.0 20.02.26
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Document title
R0253 Legal Text (Schedule 8) V3.1 02.03.26
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Problem Statement
Where a Network Party attends a site where Energy Theft has taken place, the Metering Asset may have been tampered with, and will therefore be unsafe. The Network Party, in the process of making the Metering Asset safe, will by necessity resolve any tampering. The removal of evidence of tampering is an issue for Energy Suppliers, who need this evidence to make claims under the TDIS.
Stages Selection
SME
SME Role
Lead Technical Analyst
SME Role
Lead Assurance Analyst
SME User
awaghorn@deloitte.co.uk
I0253 - Issue Proposal V1.0
I0253 - Change Proposal Re-Plan (Approved) V1.0 - 09.10.2025
R0253 Change Report (Plan) (Approved) V3.0 16.12.2025
R0253 Change Report (IA) V2.0 16.12.2025
R0253 - Change Proposal Re-Plan (Approved) V2.0 - 16.12.2025
R0253 Consolidated Impact Assessment Responses
R0253 Change Report - Consultation (Approved) V1.0 20.01.2026
R0253 Consolidated Consultation Responses V1.0
R0253 Change Report - Vote (Approved) V1.0 03.03.2026
Company Name
-
Review status
Review required
REC Changes to tie in with DCP451 - Suspending Registrations
Date of latest update
Type
Change
ID
R0248
Change Category
Other Industry Codes impacted
Change Path
Priority
Urgent
No
Latest Update
This Change Proposal was implemented as part of the 7 November 2025 REC Release.
Summary
A DCUSA Change Proposal - DCP 451 ‘Suspending Registrations’ - has been raised to look into this issue. The solution must consider a cross-code solution, which does not put consumer outcomes at risk.
Change Plan
Change Report (Proposal Plan) approved by Change Panel
Completed
Start:
Due:
Completion:
17 Jun 2025Change approved
Completed
Start:
Due:
Completion:
05 Aug 2025Impacted REC Documents
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 Document
Document title
I0248 Switching Data Management draft
Archive
Off
Problem Statement
A lack of clarity on the process for when a DNO ends a Regulatory Alliance with an Energy Supplier can cause confusion with the Energy industry, and lead to poor Consumer outcomes if the correct process is not followed.
Stages Selection
SME
SME Role
Lead Assurance Analyst
SME User
vaishnsharma@deloitte.co.uk
Issue proposal form
I0248 Change Report (Proposal Plan) V1.0
R0248 Change Report (For Consultation) v1.0
R0248 Consolidated Consultation Responses V1.0
R0248 Change Report (Final Recommendation) V1.0 - approved 05.08.25
Company Name
-
Review status
Review required
Domestic Premises Indicator Clarifications
Date of latest update
Type
Change
ID
R0246
Urgent
No
Latest Update
11/04/2025 - R0246 withdrawn at proposer's request due to overlap with MHHS M8/M10
Summary
There are two types of Domestic Premises Indicator within electricity flows, namely: • A derived DPI value which is set by the Energy Retail Data Services (ERDS) for each MPAN based on the Measurement Class and Profile Class it holds for that MPAN. • A value set by the Supplier based on the rules of the REC and Electricity Supply Licence, which is passed by the Supplier to the Central Switching Service (CSS). This change seeks to make it clearer to REC Data Specification users which DPI value is which.
Status
Implementation Status
Date Raised
Fuel
Date of Update to Priority
Solution Development
Stages Selection
DPI Clarification - Draft Legal Text.docx
Proposal Form
Company Name
-
Review status
Review required
MHHS Incremental Changes for go live
Date of latest update
Type
Change
ID
R0241
Change Category
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
This Issue looks to assess and confirm the scope to be taken forward into the Change Proposal that will deliver critical updates to the REC MHHS Code Drafting. Any potential scope items that have material impacts over and above the approved MHHS design will be considered as having unacceptable risk to the intended Change Proposal and will not be included in the confirmed scope.
Change Plan
Change Proposal Plan approved
Completed
Start:
30 Jan 2025Due:
04 Mar 2025Completion:
04 Mar 2025Issue scope developed and presented at Change Issues Group meetings (06 March, 03 April, 01 May)
Completed
Start:
04 Mar 2025Due:
01 May 2025Completion:
01 May 2025Solution and legal drafting presented to Code Drafting Working Group
Completed
Start:
01 May 2025Due:
13 May 2025Completion:
13 May 2025Solution and legal drafting endorsed by Cross Code Advisory Group
Completed
Start:
13 May 2025Due:
28 May 2025Completion:
28 May 2025Ofgem direction received
Completed
Start:
28 May 2025Due:
04 Jun 2025Completion:
04 Jun 2025Consultation published
Completed
Start:
04 Jun 2025Due:
17 Jun 2025Completion:
17 Jun 2025Change Report (Consultation) approved at Change Panel
Completed
Start:
17 Jun 2025Due:
17 Jun 2025Completion:
17 Jun 2025REC Change Panel vote on Code Manager's recommendation
Completed
Start:
17 Jun 2025Due:
15 Jul 2025Completion:
15 Jul 2025Authority referral sent
Completed
Start:
15 Jul 2025Due:
17 Jul 2025Completion:
16 Jul 2025Authority decision published
In Progress
Start:
17 Jul 2025Due:
05 Sep 2025Completion:
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 Document
Document title
I0241 Scope Tracker 06.05.2025
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Document title
I0241 Programme Design Updates 06.05.2025
Archive
Off
Document title
I0241 Programme Design Updates 06.03.2025
Archive
Off
Document title
I0241 - Programme Design Updates reference documents
Archive
Off
Document title
CR056 Change Request - MHHS Programme Website
Archive
Off
Document title
I0241 Consequential Change - DTN Market Messages 06.05.2025
Archive
Off
Document title
I0241 Consequential Change - EES API 06.05.2025
Archive
Off
Document title
I0241 - Solution Appendix - EES API v1.0
Archive
Off
Document title
I0241 Drafting Updates - EES Service Requirements 06.05.2025
Archive
Off
Document title
I0241 Drafting Updates - Alignments 06.05.2025
Archive
Off
Document title
I0241 Drafting Updates - Related Metering Points 06.05.2025
Archive
Off
Document title
I0241 - Solution Appendix - Related Metering Points v1.0
Archive
Off
Document title
I0241 - Related Metering Points reference documents
Archive
Off
Document title
I0241 EMDS Corrections Summary 08.07.2025
Archive
Off
Document title
I0241 EMDS Corrections Summary 06.03.2025
Archive
Off
Document title
M8 Control Log v1.0 2 REC Corrections extract 05.03.2025
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Off
Document title
I0241 Drafting Updates - MHHS Activation 06.05.2025
Archive
Off
Document title
R0241 Drafting Updates - Migration Schedule 08.07.2025
Archive
Off
Document title
R0241 Legal text for Decision 08.07.2025 - Approved
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Off
Document title
R0241 Solution documents for Decision 08.07.2025
Archive
Off
Document title
R0241 Legal text for Consultation
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Document title
EMDS MHHS v1.4 - updated for DCUSA only
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Document title
REC Drafting I0241 - CDWG 06.05.2025
Archive
Off
Document title
I0241 Code Drafting CHIG 01.05.2025
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Off
Document title
MHHS Collaboration Base - Code Drafting Working Group
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Document title
M8 Code Change - MHHS Programme Page
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Problem Statement
It is critical to the implementation of MHHS that design changes approved by the MHHS Programme are reflected in the REC MHHS Code Drafting. The REC MHHS Code Drafting was approved by the Authority, to meet MHHS Programme Milestone M7, through R0209 and incremental changes that were not included under that Change Proposal, now need to be taken through REC change governance as captured under the R0209 RAID, Risk R001 and Assumptions A005 and A006.
Stages Selection
SME
SME Role
Lead Technical Analyst
SME Role
Lead Assurance Analyst
SME User
vaishnsharma@deloitte.co.uk
I0241 - MHHS Incremental Changes for go live - Issue Form
I0241 Change Report (Proposal Plan) (Approved) v1.0 04.03.2025
R0209 Change Report (Post-Vote) v2.0 05.11.2024.pdf
I0241 Introduction at Change Issues Group 06.02.2025
Authority Led SCR REC Change Proposal on the MHHS arrangements - letter to REC Panel Chair 04.06.2025
I0241 Consolidated Party IA Responses PUBLIC 05.06.2025
R0241 Change Report (Consultation) v2.0 17.06.2025
R0241 Consolidated Consultation Responses PUBLIC v1.0
R0241 Change Report (Post Vote) v2.0 15.07.2025
R0241-MHHS-incremental-changes-for-go-live Ofgem Decision 07.08.2025.pdf
Company Name
-
Review status
Review required
Housekeeping February 2025
Date of latest update
Type
Change
ID
R0239
Change Path
Priority
Urgent
No
Latest Update
Housekeeping Change implemented on the 28 February 2025.
Summary
The code manager has identified a number of non-material clarifications, typographical errors and changes needed to REC products.
Status
Implementation Date
28 February 2025
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Proposed Solution Document
Document title
R0239 Legal text.zip
Archive
Off
Problem Statement
This Housekeeping Change Proposal seeks to make typographical and formatting corrections that have been identified and improve consistency across the REC.
Stages Selection
R0239 Housekeeping Change Report
Company Name
-
Review status
Review required