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)
Archive
Off
Document title
R0257 Legal drafting
Archive
Off
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
Terms of Reference Updates
Date of latest update
Type
Change
ID
R0255
Change Category
Change Path
Priority
Urgent
No
Latest Update
This Change Proposal was implemented as part of the 7 November 2025 REC Release.
Summary
To include representation and involve SEC Performance Assurance in PAB meetings and to review REC PAB terms of reference. Plus changes to the CCSG ToRs.
Status
Implementation Date
07 November 2025
| Included changes | Affected REC Items | |
|---|---|---|
| R0003 | Market-wide Half-Hourly Settlement Implementation |
Implementation Status
Date Raised
REC Decision Maker
Date of Update to Priority
Solution Development
Proposed Solution Document
Document title
Draft changes for REC PAB and CCSG (zip)
Archive
Off
Problem Statement
The current ToRs for CCSG and PAB discussions and attendees have a limitation due to the codes that are listed. This prevents further involvement from other industry code bodies where cross code working is required.
Stages Selection
SME
SME Role
Lead Assurance Analyst
SME User
vaishnsharma@deloitte.co.uk
Draft REC PAB ToRS (pre-approved)
R0255 - Change Report (Final Recommendation) Approved 05.08.25
R0255 - Change Report (Proposal Plan)
Draft CCSG ToRs (pre-approved)
Change Proposal form
R0255 Change Report (Consultation - Approved) V1.0 17.06.25
R0255 - Non-Confidential Consultation Response
Company Name
-
Review status
Review required
Missing Scenario Variants in D0179 Alternate Solution
Date of latest update
Type
Change
ID
R0235A
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
Within MHHS SIT there is a scenario where the LDSO generates a D0139 to the MS for a PPM but the requirement is for the MS to generate a D0179. There is a gap in the D0179 data required and that provided on the D0139. 21.5.1 & 21.5.6 under Schedule 14 states that where the DNO changes the energisation status, within 3 WD of changing the energisation status the DNO will send the D0139 or the D0179(21.5.6) to the MS and then the MS will generate the D0179 to the Supplier(21.5.6). Currently, the LDSO only generates the D0179 to the Supplier but not to the MOP and the only change under MHHS is to add the new variant MSS.
Original CP
Impacted REC Documents
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
R0235A Schedule 14 - Metering Operations current draft
Archive
Off
Document title
R0235A Schedule 14 - Metering Operations MHHS draft
Archive
Off
Problem Statement
DNOs and MOAs cannot fulfil their full obligations listed in Schedule 14 Metering Operations as there missing Scenario Variants in the Data Specification preventing them from sending the D0179 to all required Parties. This alternate solution proposes the removal of the D0179 from the legal text and the D0139 to be used in all scenarios.
Stages Selection
R0235A Change Proposal form
R0235 and R0235A Change Report (Final Recommendation) V2.0 (Approved) 01.07.2025
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
Archive
Off
Document title
R0253 Draft Legal Text (Schedule 8) V2.0 13.01.26
Archive
Off
Document title
R0253 Draft Legal Text (Schedule 8) V3.0 20.02.26
Archive
Off
Document title
R0253 Legal Text (Schedule 8) V3.1 02.03.26
Archive
Off
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
Amendment to the Business Case for R0044
Date of latest update
Type
Change
ID
R0251
Change Path
Priority
Urgent
No
Latest Update
On 19 August 2025, in line with the Code Manager Recommendation, the Change Panel voted to approve the updated Business Case for R0044 MHHS Programme Changes required to Central Switching Service.
Summary
During MHHS System Integration Testing (SIT), additional requirements for the R0044 solution have been identified by the CSS provider, which means the business case for R0044 is no longer accurate. This Change Proposal will update the business case to include the additional costs.
Status
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Problem Statement
The business case that was consulted on and approved as part of R0044 MHHS Programme Changes required to Central Switching Service is not accurate.
Stages Selection
Change Proposal form
R0251 Change Report (Final Recommendation) Approved
R0251 Consolidated consultation responses
Company Name
-
Review status
Review required
Correction to Change Management Schedule regarding sub-committee voting
Date of latest update
Type
Change
ID
R0249
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
20.4 of Schedule 5 Change Management currently states "decisions of the relevant responsible sub-committee shall be made by a majority vote". This is factually incorrect as the Metering Expert Panel is subject to different voting arrangements.
Change Plan
Proposal Plan approved by Change Panel
Completed
Start:
Due:
Completion:
15 Apr 2025Status
Implementation Date
27 June 2025
Implementation Status
Date Raised
REC Decision Maker
Date of Update to Priority
Solution Development
Problem Statement
As a Category 1 document, Schedule 5 Change Management takes precent over Category 3 documents such as the Metering Expert Panel Terms of Reference. This change removes conflict identified within the REC.
Stages Selection
Change Management draft.doc
Change Proposal Form
R0249 Change Report (Proposal Plan) V1.0 Approved 15.04.2025
R0249 Change Report (For Consultation) V1.0
R0249 Consolidated Consultation Responses v1.0
R0249 Change Report (Final Recommendation) V1.0 Approved 03.06.25
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
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
Archive
Off
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
Archive
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
Archive
Off
Document title
R0241 Solution documents for Decision 08.07.2025
Archive
Off
Document title
R0241 Legal text for Consultation
Archive
Off
Document title
EMDS MHHS v1.4 - updated for DCUSA only
Archive
Off
Document title
REC Drafting I0241 - CDWG 06.05.2025
Archive
Off
Document title
I0241 Code Drafting CHIG 01.05.2025
Archive
Off
Document title
MHHS Collaboration Base - Code Drafting Working Group
Archive
Off
Document title
M8 Code Change - MHHS Programme Page
Archive
Off
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
Data alignment of meter information through MHHS Migration
Date of latest update
Type
Issue
ID
I0240
Change Category
Change Path
Priority
Urgent
No
Latest Update
30/04/2026 - The Code Manager has now published the I0240 - Scenario Guidance Document V2.0 on the REC Portal. This is available on the I0240 Proposal Page and the Market-wide Half Hourly Settlement Hub.
Summary
This Issue looks to address that when Meter updates are made during a Market Wide Half-Hourly Settlement (MHHS) migration, whilst the Meter Technical Details (MTDs) will be shared between participants, there will be no update sent to the Registration Service as the Gaining Meter Operator Agent (MOA) will not know that they need to send a D0312 (for reverse migration) or IF005 (for forward migration) and the Losing MOA cannot send the message.
Impacted REC Documents
Status
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Proposed Solution Document
Document title
I0240 - Data Alignment of Meter Information Through MHHS Migration - Scenario Guidance Document V2.0 (30.04.2026)
Archive
Off
Problem Statement
During MHHS migration, key Market Messages from the Losing MOA, such as D0312, IF005, D0205, and D0139, are rejected by the Registration Service, preventing updates to meter details and Energisation status. This creates a risk of data misalignment, as the Gaining MOA may not be aware that updates occurred and therefore cannot resend them.
Stages Selection
Stages Selection
SME
SME Role
Lead Technical Analyst
SME Role
Lead Assurance Analyst
SME User
vaishnsharma@deloitte.co.uk
I0240 - Submission Form
I0240 - Change Report (Proposal Plan) V1.0 (08.07.2025) Approved
Company Name
-
Review status
Review required