Performance Assurance Report Catalogue Updates (MHHS)
Date of latest update
Type
Change
ID
R0202
Change Category
Change Path
Urgent
No
Latest Update
This Change Proposal has been implemented as part of the REC Release on 27 June 2025.
Summary
This change seeks to update the Performance Assurance Reporting Catalogue (PARC) to capture data items required to continue to appropriately monitor Retail Risks under Market-wide Half Hourly Settlement (MHHS) industry arrangements. Some housekeeping changes, for the PARC, have also been included in this change.
Change Plan
Proposal Plan approved
Completed
Start:
08 Aug 2024Due:
03 Sep 2024Completion:
03 Sep 2024Party impact assessment completed
Completed
Start:
03 Sep 2024Due:
04 Oct 2024Completion:
04 Oct 2024Change Report approved for Consultation
Completed
Start:
04 Oct 2024Due:
25 Mar 2025Completion:
25 Mar 2025Consultation completed
Completed
Start:
25 Mar 2025Due:
15 Apr 2025Completion:
15 Apr 2025RECPAB Voting
In Progress
Start:
15 Apr 2025Due:
29 Apr 2025Completion:
Status
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
03 RECPAB_24_0827_04E Draft changes to the PARC for MHHS (27.08.2024)
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Document title
R0202 RECPAB_23_PARC V5.2 - REDLINE MHHS - MEM only (18.03.2025)
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Document title
R0202 RECPAB_23_PARC V5.2 - REDLINE MHHS - MEM only APPROVED 29.04.2025
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Problem Statement
The PARC currently does not capture all the data items required to support the monitoring of Retail Risks following Market-wide Half Hourly Settlement go-live. An update to the PARC is required to include the data items that will ensure the Code Manager can provide the assurance the industry requires during transition and under the new MHHS arrangements.
Stages Selection
SME
SME Role
Lead Technical Analyst
SME User
beth.brown@capgemini.com
SME Role
Lead Assurance Analyst
SME User
awaghorn@deloitte.co.uk
RECPAB_23_Performance Assurance Report Catalogue V5.2 - REDLINE.xlsx
R0202 - PARC Updates (MHHS) (CP Form)
R0202 Change Proposal Re-Plan v1.0 31.10.24
R0202 Change Report (Proposal Plan) v2.0 (Approved) 03.09.2024
R0202 Change Proposal Re-Plan V2.0 (Approved) 20.03.2025
R0202 Change Report (Consultation) v1.0 (Approved) 25.03.2025
R0202 Consolidated Consultation Responses V1.1 (22.04.2025)
R0202 Change Report (Final Recommendation) (Post-Vote) v2.0
Company Name
-
Review status
Review required
Creation of a Tool to Manually Correct ERDS / CSS Discrepancies
Date of latest update
Type
Change
ID
R0201
Change Category
Change Path
Priority
Urgent
No
Latest Update
This Change Proposal was implemented on 27 March 2026.
Summary
There is currently a tool utilised by DNOs to manually correct registration data to align the Registered Supplier in ERDS with the data held in CSS. The Market-Wide Half Hourly Settlement (MHHS) Design does not allow for retrospective amendment of Supplier Registration i.e. there is no equivalent tool for manual correction post MHHS go live (M10). Therefore, post MHHS implementation, any issues which prevent CSS data being reflected in ERDS cannot be corrected. This will prevent the Supplier from appointing agents and will lead to errors in settlement data under the BSC. A change is required to address this.
Change Plan
Change Issue Group
Completed
Start:
01 Aug 2024Due:
01 Aug 2024Completion:
01 Aug 2024Proposal Plan Approval
Completed
Start:
01 Aug 2024Due:
03 Sep 2024Completion:
03 Sep 2024Status
Implementation Date
27 March 2026
| Included changes | Affected REC Items | |
|---|---|---|
| R0100 | Update to Error Handling Documents |
Documents
| Name | Version | Last updated | Actions |
|---|---|---|---|
| 1.0 | 23 Jun 2026 |
|
|
| 1.0 | 08 Jun 2026 |
|
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Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Proposed Solution Document
Document title
Indicative PARC extract for R0201
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Document title
Solution Development Report published for Impact Assessment
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Document title
Legal Text published for Impact Assessment
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Document title
R0201 - Solution Development Report 270824
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Problem Statement
There are instances where ERDS (and SMRS under BSC governance) can be misaligned with the CSS and under the MHHS arrangements there is no mechanism for manual correction which there is in place today. From MHHS go live the Supplier will not be able to appoint their preferred agents. This issue only applies to MHHS Migrated Metering Points as the existing mechanism for manually correcting data would be used if the issue related to a non-migrated Metering Point. In the event that the Supplier cannot appoint its agents, this may prevent the Supplier from accurately billing the Consumer. The potential impact will increase as MHHS Migration continues, with more MHHS Metering Points potentially impacted by any CSS / ERDS discrepancy.
Stages Selection
SME
SME Role
Lead Technical Analyst
SME Role
Lead Assurance Analyst
SME User
vaishnsharma@deloitte.co.uk
CP Form - CSS ERDS Discrepancy
R0201 Change Proposal Re-Plan V2.0 Approved
Change Proposal Re-Plan V3.0 Approved
Change Report for Impact Assessment
RECCo Overview Slides - CSS and ERDS Discrepancies
R0201 Change Report Proposal Plan V2.0 (Approved) 03.09.2024
R0201 - Change Proposal Re-Plan v1.0 (Approved) 15.10.2024
R0201 Consolidated Impact Assessment Responses (Public)
R0201 Change Report (Consultation) v1.0 12.08.2025
R0201 Consolidated Consultation Responses V1.0
R0201 Change Proposal Re-plan V4.0
Company Name
-
Review status
Review required
Review of the REC's Address Management Service
Date of latest update
Type
Issue
ID
I0200
Change Category
Change Path
Priority
Urgent
No
Latest Update
13/05/2026 - The REC Code Manager is establishing a new REC working group to support the progression of I0200 – Review of the REC’s Address Management Service. If you would like to attend the I0200 Working Group, please register your interest by contacting the Code Manager at change.management@recmanager.co.uk. The first meeting will take place in June 2026, with the exact date and time to be confirmed in due course and communicated via the REC Change Bulletin and via email to all those who register their interest.
Summary
Having the incorrect address can lead to a range of Consumer issues, including switching, billing and meter reading problems. The Meter Point Location (MPL) and Retail Energy Location (REL) have been added to the Code to resolve this issue. Whilst there had been progress resolving address data issues, there is not currently a mechanism to establish Code level targets for address improvement, resulting in around 2.8 million unmatched addresses.
Impacted Consumers
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
There has been progress resolving address data issues, but there is no mechanism to clearly establish Code level targets for address improvement, or overall market performance.
Stages Selection
Stages Selection
SME
SME Role
Lead Assurance Analyst
SME User
amoden@deloitte.co.uk
I0200 - Improving Address Management Targets (Issue Form)
I0200 - Change Issues Group paper
I0200 - Change Report (Proposal Plan) V1.1 (Approved) 18.02.2025
I0200 - Update to Plan (Pre Approval) 14.04.2026
Company Name
REC Code Manager
Review status
Review required
A process for resolution of gas unregistered sites
Date of latest update
Type
Issue
ID
I0199
Other Industry Codes impacted
Change Path
Urgent
No
Latest Update
09/10/2024 - This Issue has been withdrawn as it will be progressed as part of I0172 and any Issues not related to the REC will be handed off to UNC & IGTUNC.
Summary
Issue raised by RECCo at RIG. Healthy discussions have led to a recommendation that RIG refer this to ChIG for further discussion. GTs have reported to RECCo that there are approx 85,000 unregistered sites on the networks with no process for resolution between GTs and Suppliers
Impacted Consumers
Status
Status
Implementation Status
Date Raised
Fuel
Date of Update to Priority
Solution Development
Problem Statement
Issue raised by RECCo at RIG. Healthy discussions have led to a recommendation that RIG refer this to ChIG for further discussion. GTs have reported to RECCo that there are approx 85,000 unregistered sites on the networks with no process for resolution between GTs and Suppliers
Stages Selection
Stages Selection
I0199 - Gas Unregistered Sites (PDF)
Company Name
REC Code Manager
Review status
Review required
Review of Metering Asset data transferred from MAMs to the CDSP
Date of latest update
Type
Issue
ID
I0196
Other Industry Codes impacted
Change Path
Priority
Urgent
No
Latest Update
02/09/2026 - Update to plan published ahead of review at the REC Metering Expert Panel on 09 September 2026.
Summary
It has emerged that a high proportion of gas Data Items contain mismatches when comparing between Metering Asset Managers (MAM), Gas Suppliers, and the Central Data Service Provider. This Issue seeks to explore this issue and identify mechanisms by which these mismatches may be resolved.
Impacted Consumers
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
Problem Statement
Work conducted by RPA has identified a significant number of mismatches between gas Data Items held by key stakeholders. This may result in Consumer detriment, as information relevant to an MPRN may not be held accurately by any given Party. As such, there is a need to review processes pertaining to the communication of gas data by MAMs onward to the CDSP to mitigate the potential for mismatches.
Stages Selection
Stages Selection
SME
SME Role
Lead Technical Analyst
SME Role
Lead Assurance Analyst
SME User
vaishnsharma@deloitte.co.uk
I0196 Issue Proposal Form (Word)
I0196 Issue Proposal Form (PDF)
I0196 Change Report (Plan) (Approved) V2.0 07.05.25
I0196 Change Re-Plan (Approved) V1.0 02.05.25
Company Name
-
Review status
Review required
Metering Asset Manager (MAM) Communication Method Register
Date of latest update
Type
Change
ID
R0198
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
Studies conducted by the REC Performance Assurance (RPA) function of the REC Code Manager have concluded that gas market data fidelity may be improved by reducing the frequency of missed messages between Metering Asset Managers and other REC Parties. This Issue seeks to explore mechanisms by which a reduction in the number of permissible communication methods used by MAMs could support the data quality improvement objective.
Impacted Consumers
Impacted REC Documents
Impacted REC Services
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
I0198 - Draft Schedule 14 - Metering Operations & Draft Communications Method Register
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Document title
R0198 - Draft Schedule 14 - Metering Operations & Draft Communications Method Register V2.0
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Problem Statement
MAMs communicate with each other, and with other parties, using up to three possible methods as they send Market Messages in line with their obligations in the REC. It has been suggested that moving to a single communication method might help mitigate gas data quality issues. This Issue seeks to explore an interim solution to facilitate this.
Stages Selection
SME
SME Role
Lead Assurance Analyst
SME User
beth.brown@capgemini.com
SME Role
Lead Assurance Analyst
SME User
vaishnsharma@deloitte.co.uk
I0198 Change Proposal (pdf)
I0198 Change Report (Plan) (Approved) V2.0 03.04.2
I0198 Change Proposal Re-Plan V1.0 28.03.25
I0198 Change Report (IA) V1.0 03.04.25
R0198 Consolidated IA Responses V1.0 Non-Confidential
R0198 Change Report (Consultation) V1.0 11.06.25
R0198 Change Proposal Re-Plan V2.0 02.07.25
Change Report (Consultation) V2.0 11.07.25
R0198 Consolidated Consultation Responses V1.0 06.08.25
R0198 Change Report (Final Recommendation: Pre-Vote) V1.1 13.08.25
R0198 Change Report (Final Reccomendation - Post-Vote) V1.0 13.08.25
Company Name
-
Review status
Review required
CSS Change to Allow Prevent of Registration by Market Segment
Date of latest update
Type
Issue
ID
I0194
Change Category
Change Path
Priority
Urgent
No
Latest Update
06/05/2025 - Code Manager presented solution development outcomes to Technical Change Panel on 30/04/2025 and confirmed that the issue has been resolved and will not be progressed further. An operational process will be put in place for the monitoring of Registrations by Market Segment.
Summary
To prevent a Supplier with exemptions in place that were approved, in BSC and REC PAB for Smart and Unmetered, from registering meter points other than those that they are Qualified in.
Change Plan
Change Proposal Plan approved
Completed
Start:
25 Jul 2024Due:
03 Dec 2024Completion:
03 Dec 2024Definition
In Progress
Start:
03 Dec 2024Due:
28 Feb 2025Completion:
Status
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Proposed Solution Document
Document title
I0194 - Solution Report v1.0 23.04.2025
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Problem Statement
Suppliers who do not operate, or intend to operate, in the Smart or Unmetered Market Segments, will be seeking exemptions from the relevant MHHS Qualification requirements. At present, there is no mechanism in CSS to prevent Suppliers from registering Metering Points for which an exemption has been granted and for which they are therefore not qualified.
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
PAB281_01A_Modification Proposal Form.docx
I0194 - CSS Change to Allow Prevent of Registration by Market Segment.docx
PAB281_01_Request for Exemption from Suppliers v2.0.docx
352_04_Initial Written Assessment - v1.0.docx
I0194 Proposal Plan Change Report V2.0 (Approved) 03.12.2024.pdf
I0194 - Change Proposal Re-Plan v1.0 (Approved) 27.02.2025
Company Name
-
Review status
Review required
Add Enumeration Values to the DI51035 - Communications Provider Data Item
Date of latest update
Type
Change
ID
R0193
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 the valid list of Communications Providers is being removed from MDD, Elexon have raised a change to propose this list is added to the DI51035 - Communications Provider Data Item.
Status
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
I0193 Solution Document v1.0
Archive
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Problem Statement
For the industry to maintain an ongoing list of valid Communications Providers after it is removed from MDD, Enumeration Values will be added to the Communication Provider Data Item (DI51035).
Stages Selection
SME
SME Role
Lead Assurance Analyst
I0193 - Add Enumeration Values to the DI51035 - Communications Provider Data Item
I0193 Change Report (Proposal Plan) V2.0 (Approved) 17.09.2024
I0193 Consolidated Impact Assessment Responses PUBLIC V1.0
R0193 Change Report (For Consultation) V1.0
R0193 Consolidated Consultation Responses v1.0
R0193 Change Report (Final Recommendation) Post Approval V1.0
Company Name
-
Review status
Review required
Introduction of SLA for Supplier De-Registration on Disconnected Meters
Date of latest update
Type
Change
ID
R0191
Change Category
Change Path
Priority
Urgent
No
Latest Update
This Change Proposal was implemented as part of the 7 November 2025 REC Release.
Summary
Issue has been discussed twice at RIG and has been identified via data cleanse activity. Parties identified that there are a number of meters (NG alone have 5k in this state) that are showing as terminated but an active Energy Supplier appointment. Discussion at RIG identified that REC Is potentially lacking detail/obligations/timescales on suppliers/DNOs to report/update/respond to disconnection queries.
Change Plan
Change Plan approved by Change Panel
Completed
Start:
Due:
Completion:
01 Apr 2025Presented at Change Issues Group
Completed
Start:
Due:
Completion:
03 Apr 2025Change Report (For Consultation) approved by Change Panel
Completed
Start:
Due:
Completion:
17 Jun 2025Approved at Change Panel
Completed
Start:
Due:
Completion:
05 Aug 2025Impacted Consumers
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
I0191 draft legal text for IA
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Document title
R0191 draft legal text for consultation - pre MHHS
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Document title
R0191 draft legal text for consultation - post MHHS
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Problem Statement
There is no time scale by which Energy Suppliers need to have submitted the Registration De-Activation Request or for electricity to have raised a query with the Distribution Network Operator (DNO) if they believe the Metering Point should not be Disconnected. This raises difficulties for the REC Performance Assurance team when monitoring and enforcing this obligation.
Stages Selection
I0191- De-energisation of disconnected meters
I0191 Change Report (Proposal Plan) V1.1 Approved 01.04.25
I0191 Consolidated Impact Assessment Responses v1.0
R0191 Change Report (For Consultation) V1.1
R0191 Consolidated Consultation Responses V1.0
R0191 Change Report (Final Recommendation) Approved 05.08.25
Company Name
REC Issues Group
Review status
Review required
Related Meter Point RMP status rules
Date of latest update
Type
Change
ID
R0190
Change Category
Change Path
Priority
Urgent
No
Latest Update
This Change Proposal has been implemented as part of the February 2026 REC Release.
Summary
The drafting in Schedule 28 – Related Metering Points has been updated for Market-wide Half Hourly Settlement (MHHS), allowing related Metering Points to be in a Status of Operational or Created in MPRS, as long as all Related Metering Points are in the same Status. This Change Proposal suggests allowing Secondary Metering Points with a Status of Created to be linked to Primary Metering Points with a Status of Operational, for MHHS migrated Metering Points only.
Change Plan
Presented at Change Issues Group
Completed
Start:
Due:
Completion:
07 Aug 2025Proposal Plan approved by Change Panel
Completed
Start:
Due:
Completion:
19 Aug 2025Impacted Consumers
Impacted REC Documents
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
I0190 - Draft Schedule 28 changes for IA
Archive
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Problem Statement
By not allowing Primary Metering Points with a Status of Operational to be linked to Secondary Metering Points with a Status of Created, where the Metering Points have migrated into the MHHS arrangements, full advantage is not being taken of the MHHS functionality of automatically appointing agents to Secondary Metering Points.
Stages Selection
SME
SME Role
Lead Assurance Analyst
SME User
awaghorn@deloitte.co.uk
I0190 - Related Meter Point RMP status rules
I0190 Change Report (Proposal Plan) V1.0
I0190 Consolidated Information Request Responses v1.0
I0190 Consolidated Impact Assessment Responses v1.0
I0190 Extension to Plan V1.0 approved 30.10.25
R0190 Change Report (For Consultation) V1.0 approved 18.11.25
R0190 Consolidated Consultation Responses v1.0
R0190 Change Report (Final Recommendation) V1.0 post vote
Company Name
Code Body/ Administrator
Review status
Review required