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
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
Performance Assurance Reporting Catalogue - Annual Review
Date of latest update
Type
Change
ID
R0238
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
As part of the Performance Assurance operating plan we are required to review the PARC on an annual basis to identify any changed required. This exercise has been completed and a small number of minor changes identified including updating reference material to reflect other changes to Performance Assurance artifacts (e.g. updates to the Retail Risk Register)
Change Plan
Proposal Plan Approved
Completed
Start:
Due:
Completion:
18 Feb 2025Status
Implementation Date
27 June 2025
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Proposed Solution Document
Document title
Performance Assurance Review Catalogue R0238 - v0.1
Archive
Off
Problem Statement
As part of the Performance Assurance Operating Plan, REC Performance Assurance are required to review the PARC on an annual basis to identify any changed required. The REC PAB has conducted their 2024 review of the PARC and proposed changes to update to Version 5.1. If the PARC is not kept up to date, this can lead to confusion for Parties. With some of the changes identified correcting typographic errors that can cause errors by Parties when they are uploading data.
Stages Selection
SME
SME Role
Lead Technical Analyst
SME Role
Lead Assurance Analyst
SME User
awaghorn@deloitte.co.uk
R0238 - Change Report (Impact Assessment) v1.0
R0238 - Change Report (Proposal Plan - Approved) v1.0 18.02.2025
Change Proposal form
R0238 - Consolidated Impact Assessment Responses V1.0
R0238 - Change Report (Consultation) V1.0
R0238 - Consolidated Consultation Responses (23.04.2025)
R0238 - Change Report (Final Recommendation) V2.0 (Post-Vote) 27.05.2025
Company Name
-
Review status
Review required
Erroneous Switch Review: CSS Solution
Date of latest update
Type
Issue
ID
I0237
Change Category
Change Path
Priority
Urgent
No
Latest Update
26/06/2026 On 25 June 2026, the REC Change Panel approved this extension to plan.
Summary
The current solution for Erroneous Switch (ES) resolution is failing some Consumers, there are gaps in the process and several areas that could be considered for improvement. It has been a number of years since the process has been reviewed end to end. Since then, Faster Switching has been introduced and MHHS is on the horizon.
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 Document
Document title
I0237 Erroneous Switch Draft Guidance Document V0.2
Archive
Off
Problem Statement
ES obligations are a key Consumer-impacting process which facilitate the quick resolution of Consumer detriment as efficiently as possible and requires an end-to-end review.
Stages Selection
Stages Selection
SME
SME Role
Lead Technical Analyst
SME User
vaishnsharma@deloitte.co.uk
Change proposal Form
I0237 - Change Report (Proposal plan) Approved 17.06.2025
I0237 Change Proposal Re Plan V2.0
I0237 Extension to Plan V1.0 Approved 25.06.2026
Company Name
-
Review status
Review required
REC Party Auto de-accession proposal
Date of latest update
Type
Change
ID
R0236
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
Update the REC to allow the option of any Party who has not proceeded to pursue Certification within 12 months of accession, and has not contacted the REC Code Manager in at least 6 months to indicate they wish to do so/remain acceded, to be removed without further contact or confirmation with that Party.
Change Plan
Change Report (Proposal Plan) approved by Change Panel
Completed
Start:
Due:
Completion:
04 Mar 2025Status
Implementation Date
27 June 2025
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Proposed Solution Document
Document title
I0236 - Legal Drafting v0.1
Archive
Off
Problem Statement
There are many Parties who have acceded to the REC but not Qualified within 12 months of accession, and who have not contacted the Code Manager within 6 months. This may cause confusion for Parties in knowing which other organisations have Qualified for roles under the REC.
Stages Selection
SME
SME Role
Lead Assurance Analyst
SME User
vaishnsharma@deloitte.co.uk
I0236 - Submission Form v1.0 - REC Party Auto de-accession proposal.docx
I0236 Change Report (Proposal Plan) v1.0 Approved 04.03.25
I0236 Consolidated Impact Assessment Responses v1.0
R0236 - Change Report (For Consultation) V1.0 (09.04.2025)
R0236 Consolidated Consultation Responses v1.0
R0236 Change Report (Final Recommendation) V1.0 Approved 03.06.25
Company Name
-
Review status
Review required
Missing Scenario Variants in D0179
Date of latest update
Type
Change
ID
R0235
Change Category
Change Path
Priority
Urgent
No
Latest Update
01/07/2025 - On 01 July 2025, the REC Change Panel voted to reject R0235 and approve R0235A, in line with the Code Manager's recommendation. The appeal window has closed.
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.
Change Plan
Change Report (Proposal Plan) approved by Change Panel
Completed
Start:
Due:
Completion:
04 Mar 2025Presented at Change Issues Group
Completed
Start:
Due:
Completion:
06 Mar 2025Presented at Change Issues Group
Completed
Start:
Due:
Completion:
01 May 2025Presented at REC Change Panel
Completed
Start:
Due:
Completion:
20 May 2025Alternative Change Proposals
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
I0235 D0179 Missing Scenario Variants
Archive
Off
Document title
R0235 Data Specification V0.2
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.
Stages Selection
I0235 Change Proposal Form
I0235 Change Report (Proposal Plan) V1.0 Approved 04.03.25
I0235 Consolidated Impact Assessment Responses V1.0
R0235 and R0235A Change Report (For Consultation) V1.1
R0235 and R0235A Consolidated Consultation Responses PUBLIC V1.0
R0235 and R0235A Change Report (Final Recommendation) V2.0 (Approved) 01.07.2025
Company Name
-
Review status
Review required
Non-Domestic Change of Occupier SDEP Screens (R0155 Solution)
Date of latest update
Type
Change
ID
R0232
Change Category
Change Path
Priority
Urgent
No
Latest Update
This Change Proposal was implemented as part of the 7 November 2025 REC Release.
Summary
This Issue has been raised to develop the dedicated Non-Domestic Change of Occupier SDEP screens that were not possible as part of R0155 – Change of Occupier: Evidentiary Standards and Timescales. Should this Issue progress with a developed solution, the new dedicated Non-Domestic Change of Occupier screens would replace the temporary work around provided as a temporary workaround in the R0155 solution.
Impacted REC Services
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 summary
- The solution will be developed through the Change Issues Group. Attendees will be invited to discuss and determine the requirements for the dedicated Non-Domestic Change of Occupier SDEP screens (a separate screen will be required for both Gas and Electricity). The solution will also require reporting for Performance Assurance and will include a plan for queries raised at cut over and data retention obligations. To help drive those discussions a starting point could be as follows: • Meter Point X Number (MPxN) • Multi MPxN flag – i.e. are there more than one • Date of CoO • Number of attachments • Accept evidence - Y / N – only available to the receiving supplier • Additional info – must be populated if N Auto populate: • Date of creation, date of response. • The Service Level Agreement (SLA) is 10 Working Days so it will need the RAG status based on that. Escalations screens – as per the standard REC escalations – including MPxN, date of creation and number of attachments. As part of any solution, the Code Manager will also update the non-mandatory Non-Domestic Change of Occupier Guidance Document to include further details on the newly dedicated SDEP screens, as well as further training material for Energy Suppliers.
Problem Statement
Due to the MHHS Code Freeze, newly dedicated Non-Domestic Change of Occupier SDEP screens could not be implemented as part of the R0155 solution and instead the use of re-purposed, existing screens was proposed as a temporary workaround. Energy Suppliers were clear in their responses to the R0155 impact assessment and consultation that using a temporary work around (with the temporary solution being the use of existing screens PT0056 and PT0067) would create additional workload and risk and that newly dedicated SDEP screens for Non-Domestic Change of Occupiers would still be required.
Stages Selection
SME
SME Role
Lead Technical Analyst
I0232 - Non-Domestic Change of Occupier SDEP Screens (R0155 Solution) - Issue form
I0232 - Non-Domestic Change of Occupier SDEP Screens (R0155 Solution) - Change Report (Proposal Plan) V2.0 (17.06.2025)
I0232 - Non-Domestic Change of Occupier SDEP Screens (R0155 Solution) - Change Report (Impact Assessment) 13.03.2025
R0232 - Non-Domestic Change of Occupier SDEP Screens (R0155 Solution) - Change Report (For Consultation) 05.08.2025
I0232 - Consolidated Impact Assessment Responses (Non-Confidential) 08.04.2025
R0232 - Non-Confidential Consolidated Consultation Responses (02.09.2025)
R0232 - Change Report (Final Recommendation) V2.0 (Approved) 16.09.2025
SDEP User Training Deck v2.0
I0232 - Extension to Plan V1.0 (06.06.2025) Approved
Company Name
-
Review status
Review required
Shared Sites in Electricity Enquiry Service (EES)
Date of latest update
Type
Issue
ID
I0231
Change Category
Change Path
Priority
Urgent
No
Latest Update
30/03/2026 The Proposer has withdrawn this Issue following discussions with industry, where impacted Parties advised waiting for the completion of MHHS migration before progressing this Issue and solution development. The window to adopt this Issue has now closed.
Summary
There is a concern regarding shared sites (as defined by BSCP550) that have multiple suppliers linked to them. The investigation revealed a lack of visibility of these sites, and it appears that the industry is similarly uninformed. Elexon, the REC, and the wider industry do not have a consistent way of identifying these shared sites. Therefore, there is a good chance that agents are holding shared sites within their portfolio without knowing it. We would like to explore whether the EES Online Portal has any flags or mechanisms that could help identify these shared sites.
Impacted REC Services
Status
Status
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Proposed solution summary
- A flag on EES that can help everyone clearly identify the shared site, the primary MPAN and all of the pseudo MPANs attached to it.
Problem Statement
There is a concern regarding shared sites (as defined by BSCP550) that have multiple suppliers linked to them. The investigation revealed a lack of visibility of these sites, and it appears that the industry is similarly uninformed. Elexon, the REC, and the wider industry do not have a consistent way of identifying these shared sites. Therefore, there is a good chance that agents are holding shared sites within their portfolio without knowing it. We would like to explore whether the EES Online Portal has any flags or mechanisms that could help identify these shared sites. If not, could these be added?
Stages Selection
Stages Selection
SME
SME Role
Lead Technical Analyst
SME Role
Lead Assurance Analyst
SME User
vaishnsharma@deloitte.co.uk
Issue Proposal Form
Company Name
-
Review status
Review required
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
Supply Point Enquiry API Technical Specification Updates
Date of latest update
Type
Change
ID
R0229
Change Category
Change Path
Priority
Urgent
No
Latest Update
10/02/2025 - Change withdrawn and will be progressed as a Housekeeping change under R0239 Housekeeping Feb 2025. The adoption window has now closed.
Summary
The content detailed in Section 4.2 Responses is incorrect. We would like to amend the responses included in this section so that users are able to access the correct technical specifications for the service that they are consuming.
Change Plan
Change discussed at Change Panel
Completed
Start:
Due:
Completion:
21 Jan 2025Status
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Problem Statement
The example responses detailed in section 4.2 are broken down as ‘mprn’ with three demoed data items; ‘mprn’, ‘installation name’, and ‘network name.’ this is however not reflective of the correct responses that would actually be returned on an API call. The actual structure is ‘supplier’ with the demoted data items actually being ‘amr_indicator’, ‘amr-sp’, and ‘csep_id.’ Fundamentally, this would mean that users are consuming incorrect information when looking to this document for guidance. This could potentially be causing negative impacts when the document is relied upon, especially for newer users seeking guidance.
Stages Selection
SME
SME Role
Lead Technical Analyst
SME Role
Lead Assurance Analyst
SME User
amoden@deloitte.co.uk
API GES Supply Point Enquiry Technical Specification v2.0.pdf
Change Proposal Form
Company Name
-
Review status
Review required