Guidance on Electricity Metering Points - MHHS
Date of latest update
Type
Change
ID
C3-0137
Urgent
No
Latest Update
-
Summary
This Cat 3 CP is to implement the new ‘Guidance on Electricity Metering Points – MHHS’. This is an additional document to the existing ‘Guidance on Electricity Metering Points’. It includes amendments to make the document relevant for MHHS Metering Points. The existing document remains valid for non-MHHS Metering Points.
Status
Implementation Status
Date Raised
Date of Update to Priority
Stages Selection
Company Name
Code Manager (RPS)
Review status
Review required
MHHS Metering Guidance
Date of latest update
Type
Change
ID
C3-0136
Urgent
No
Latest Update
-
Summary
This Cat 3 CP is to implement the following new metering guidance documents created to support Parties with understanding systems and processes updated for the new Market-wide Half Hourly Settlement (MHHS) arrangements: Sharing Metering Asset Data – MHHS Guidance Document Change of Market Segment – MHHS Guidance Document MOA Appointment – MHHS Guidance Document These documents were consulted on in June and July 2025 and were approved by the Metering Expert Panel to be implemented as Category 3 documents under their responsibility at the July and August MEP meetings.
Status
Implementation Status
Date Raised
Date of Update to Priority
Stages Selection
Company Name
Code Manager (RPS)
Review status
Review required
CSS Certificate Authority audit clarification
Date of latest update
Type
Change
ID
R0280
Change Category
Change Path
Priority
Urgent
No
Latest Update
This Change Proposal has been implemented as part of the February 2026 REC Release.
Summary
CSS Certificate Authority Service Definition clause 9.1 states that the CSS CA Service will be audited each year by a third party against an approved compliance standard and or methodology. The clause however does not state who initiates the audit (i.e. RECCo, the Code Manager, Switching Operator etc.) and engages with the third party.
Change Plan
Proposal Plan approved at Change Panel
Completed
Start:
Due:
Completion:
21 Oct 2025Impacted REC Parties and Market Participants
Status
Implementation Date
27 February 2026
Implementation Status
Date Raised
REC Decision Maker
Date of Update to Priority
Solution Development
Proposed Solution Document
Document title
R0280 Legal Text approved 16.12.2025 v1.0
Archive
Off
Problem Statement
Section 9 of the CSS Certificate Authority Service Definition document mandates an annual third-party audit of the CSS Certificate Authority Service against an approved compliance standard or methodology. However, it does not specify the audit technique or methodology to be used, nor does it specify who is responsible for initiating the audit and engaging with the third-party.
Stages Selection
SME
SME Role
Lead Assurance Analyst
SME User
amoden@deloitte.co.uk
R0280 submission form
R0280 Change Report (Proposal Plan) v1.0 approved 21/10/2025
R0280 Change Report (For Consultation) v1.0
R0280 Consolidated Consultation Responses v1.0
R0280 Change Report (Final Recommendation) Approved 16.12.25 v1.0
Company Name
-
Review status
Review required
Housekeeping November 2025
Date of latest update
Type
Change
ID
R0279
Change Category
Change Path
Priority
Urgent
No
Latest Update
This Change Proposal was implemented as part of the 7 November 2025 REC Release.
Summary
The Code Manager has identified a number of non-material clarifications, typographical errors and changes needed to REC products.
Change Plan
Approved at Change Panel
Completed
Start:
Due:
Completion:
21 Oct 2025Status
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
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
November 2025 Housekeeping summary spreadsheet V1.0
November Housekeeping legal text (zip file) V1.0
R0279 Housekeeping Change Report V1.0 approved 21.10.25
Company Name
-
Review status
Review required
Addition of new category to EES DAM (NESO)
Date of latest update
Type
Change
ID
C3-0135
Urgent
No
Latest Update
-
Summary
This change proposes that several data items be made available for NESO to fulfil its role in the strategic direction of the GB energy system.
Status
Implementation Status
Date Raised
Date of Update to Priority
Stages Selection
Company Name
Code Manager (RPS)
Review status
Review required
Establishing the Safe Isolation Provider (SIP) as a Standalone REC Party
Date of latest update
Type
Issue
ID
I0278
Change Category
Other Industry Codes impacted
Change Path
Priority
Urgent
No
Latest Update
21/07/2026 - An Update to Plan has been approved by the Change Panel on 21 July 2026.
Summary
This proposal recommends the formal recognition of the Safe Isolation Provider (SIP) as a standalone Party under the Retail Energy Code (REC). This aligns with the direction set out in Ofgem’s recently published Strategic Direction Statement (SDS), which explicitly calls for the establishment of SIPs as a standalone Party role. The aim is to address the growing scale of unregulated SIP activity, mitigate associated consumer safety risks, and ensure the metering industry is equipped to support the UK’s Net Zero ambitions. By enabling easier access to certified SIPs, this change will enhance consumer protection, accelerate low-carbon technology deployment, and improve operational efficiency across the energy sector.
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
The current SIP framework poses several risks: - Consumers, MEMs and unaccredited practitioners’ safety. Unaccredited and unregulated isolation work increases the risk of unsafe installations and potential harm to Consumers. NAPIT highlighted to RECCo and DESNZ that 17 and 13 unregulated practitioners respectively died in 2023 and in 2024 due to unsafe isolation. With the right Party undertaking this work, there would also be less safety issues for the Consumer at their premises; - Inequity. Independent Installers face longer wait times compared to supplier-led installations, creating a two-tier system; - Low competitive market. Currently prospective Parties can be put off from applying to be a SIP as it appears they would need full MEM Accreditation which is often too far outside their current business operating model. Providing SIPs with their own pathway and requirements could result in more Parties becoming SIPs and therefore giving Consumers more choice in their provider; and - Decarbonisation delays. The inability to scale SIP capacity undermines the timely deployment of LZCTs, threatening Net Zero targets.
Stages Selection
Stages Selection
SME
SME Role
Lead Technical Analyst
SME Role
Lead Assurance Analyst
SME User
amoden@deloitte.co.uk
I0278 submission form
I0278 Change Report (Proposal Plan) V1.0 (Pre-Approval) 09.10.2025
I0278_Change Report (Extension to Plan) v1.0 (Pre-Approval) 12.01.2026
I0278_Change Report (Extension to Plan) v2.0 (Pre-Approval) 13.07.2026
I0278_Change Report (Extension to Plan) v2.1 (Approved) 21.07.26
I0278_Consolidated Information Request DNO Responses
I0278_Consolidated Information Request MEM-SIP Responses PUBLIC
I0278_Consolidated Information Request RPA Responses
Company Name
-
Review status
Review required
Data Latency SLA Alignment for Gas Enquiry Service
Date of latest update
Type
Change
ID
R0277
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 current performance level for the processing of Data from CDSP is no longer fit for purpose and does not reflect the operational capability of the service. The performance level was originally conceived as part of the CSS programme in 2022 and operational reality has shown it is not required by industry. A revision of the performance level will align service performance metrics with system performance and deliver economic benefit.
Change Plan
Proposal Plan approved at Change Panel
Completed
Start:
Due:
Completion:
07 Oct 2025Impacted REC Services
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
R0277 Legal Text For Consultation
Archive
Off
Problem Statement
The current performance levels for the processing of data from CDSP is no longer fit for purpose and does not align with system or service performance. The CSDP is also not meeting these performance levels on a monthly basis. While there are no known issues on data latency raised by users, this change to clarify performance levels is needed for the GES reinstated contract and to ensure ongoing service delivery.
Stages Selection
SME
SME Role
Lead Technical Analyst
SME Role
Lead Assurance Analyst
I0277 submission form
I0277 Change Report (Proposal Plan) approved 07/10/2025
R0277 Change Report (For Consultation) v1.0
R0277 Change Report (Final Recommendation) Approved 26.11.25 v1.0
Company Name
-
Review status
Review required
SFIC to CMRM - missing Scenario Variant in D0126 / MM00016
Date of latest update
Type
Change
ID
R0276
Change Category
Change Path
Priority
Urgent
No
Latest Update
This Change Proposal has been implemented as part of the June 2026 REC Release.
Summary
It has been raised to the Code Manager by a Party that the Scenario Variant of Supply Fault Information Centre (SFIC) to Crowded Meter Room MEM (CMRM) is missing from the D0126 / MM00016 (Asset Condition Report Response / Clearance) Market Message. This should have been introduced as part of REC Change R0043 which introduced the role of the CMRM.
Change Plan
Change Report (Proposal Plan) approved by Change Panel
Completed
Start:
Due:
Completion:
16 Sep 2025Status
Implementation Date
26 June 2026
| Included changes | Affected REC Items | |
|---|---|---|
| R0103 | Central provision of DCC Technical Contacts for requesting test certificates |
|
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Proposed Solution Document
Document title
SFIC to CMRM - missing Scenario Variant in D0126 red-lining (IA)
Archive
Off
Document title
SFIC to CMRM - missing Scenario Variant in D0126 red-lining (consultation)
Archive
Off
Problem Statement
CMRMs can send the D0135 / MM00023 Asset Condition Report Market Message to the SFIC, but the SFIC cannot send a response on the D0126 / MM00016 Asset Condition Report Response / Clearance Market Message to confirm the outcome of their investigation.
Stages Selection
R0276 submission form
R0276 Change Report (Proposal Plan) V1.0 approved 16.09.25
R0276 Consolidated Impact Assessment Responses PUBLIC v1.0
R0276 Change Report (For Consultation) V1.0
R0276 Consolidated Consultation Responses v1.0
R0276 Change Report (Final Recommendation) V1.0 approved 17.12.25
Company Name
-
Review status
Review required
MHHS Related Metering Points across Market Segments
Date of latest update
Type
Issue
ID
I0275
Change Category
Other Industry Codes impacted
Change Path
Priority
Urgent
No
Latest Update
06/11/2025 - Following discussions at the Change Issues Group on 06 November, a REC guidance will be developed to support the resolution of this Issue after which it will be classed as resolved.
Summary
It has been identified by the MHHS Data Cleanse Working Group (DCWG) that around 9,000 existing Metering Point Relationships include Metering Points that would migrate into different Market-wide Half Hourly Settlement (MHHS) Market Segments. The majority of these are where one Metering Point has a Traditional meter installed (Smart Segment) and a Related Metering Point has an Advanced meter (Advanced Segment). This situation is currently valid but in MHHS would cause two problems. - SMRS would not be able to align the agent appointments, leaving secondary MPANs without agents and MHHS Migrations unable to fully complete.
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
Without considering this Issue, there will be a risk to the MHHS migration. Indeed, a Metering Point installed which does not match its Related Metering Point (for example a Relationship between a Traditional meter with an Advanced Meter) will not be able to fully migrate to MHHS arrangements.
Stages Selection
Stages Selection
I0275 submission form
Company Name
-
Review status
Review required
Gas Pressure and Capacity Information Transparency
Date of latest update
Type
Issue
ID
I0274
Change Category
Change Path
Priority
Urgent
No
Latest Update
21/07/2026 - Change Report (Proposal Re-Plan) approved at Change Panel
Summary
As per Section 13.4.18 of CoMCoP, retrieving gas pressure and capacity information from Transporters via the GT1 process can be time consuming for Energy Suppliers/MAMs and/or Consumers. The process of retrieving this information is inconsistent and service timescales are varied between transporters. Gas pressure and capacity information should be readily available through the Gas Enquiry Service to enable timely processing of site work and requests to enable MAM’s and Suppliers to appropriately service their customers.
Impacted REC Services
Status
Status
Implementation Status
Date Raised
Fuel
REC Decision Maker
Date of Update to Priority
Solution Development
Problem Statement
For some Energy Suppliers, MAMs and consumers, retrieving pressure and capacity information via the GT1 process can be time consuming. This is due to elements like response timescales and methods (batch responses vs individual responses) being varied among GTs. This ultimately has a negative impact on customers waiting on site work, such as a new connection, for example.
Stages Selection
Stages Selection
SME
SME Role
Lead Technical Analyst
SME Role
Lead Assurance Analyst
I0274 submission form
I0274 Change Report (Proposal Plan) V1.0 approved 18.11.25
IG174 Change Proposal Re-Plan v2.0 approved 21.07.2026
Company Name
-
Review status
Review required