Back

Amendments to D0312 to align with BSC CP1622

  • 1
    Initial Assessment
  • 2
    Solution Development
  • 3
    Consultation
  • 4
    Decision
  • 5
    Awaiting Implementation
  • 6
    Implemented
Step 6 of 6
Implemented
Summary
Elexon have raised CP1622 to amend the Validation rules within the Supplier Meter Registration Service (SMRS) for the Number of Register Digits Data Item within the IF-005 Market Message, to allow digit values from 1–9, ensuring accurate data and reducing exceptions. There are no Validation rules related to the D0312 Market Message which need to be amended under the Balancing and Settlement Code (BSC), but the D0312 itself contains a Data Item Rule regarding the Number of Displayed Register Digits which needs to be amended in line with CP1622.

Latest update and next planned activity

Date of latest update
Latest Update
This Change Proposal has been implemented as part of the June 2026 REC Release.

Impacts Overview

Impacted REC Parties and Market Participants
Distribution Network Operator Energy Supplier Meter Operator Agent
Other Industry Codes impacted
Balancing and Settlement Code (BSC)
Priority and rationale
High

Priority last updated on 17 Sep 2026

Solution development

Problem Statement
BSC CP1622 is looking to address that SMRS cannot accurately update the Number of Displayed Register Digits for a SMETS2 Smart Electricity Meter due to Validation rules currently in place. The Validation rules proposed to be amended are those on the IF-005, which has direct impacts to the D0312.

No documents available.

There is currently no Change Plan.

Original submission

Change details

- - -
11 Dec 2025

Change details

Amendments to D0312 to align with BSC CP1622
The MHHS Programme Data Cleanse Closure Report identified an issue affecting around 250,000 SMETS2 electricity meters with Meter Register Digit configurations incompatible with MHHS design specifications. This prevents the Supplier Meter Registration Agent (SMRA) from accurately updating or recording register digits, risking data discrepancies, billing errors, and settlement issues.

Elexon have raised CP1622 to amend the validation rules within SMRS for the IF-005 to allow digit values from 1–9, ensuring accurate data and reducing exceptions.

There are no validation rules related to the D0312 which need to amended under the BSC, but the D0312 itself contains a Data Item Rule regarding the Number of Displayed Register Digits which needs to be amended in line with CP1622.
The Number of Displayed Register Digits Data Item allows any integer between 1 and 9, but the Data Item Rule states: Where the Meter Type is S1, the value should be populated as per the manufacturer specification. Where the Meter Type is S2A, S2AD, S2ADE, 2ADF, 2ADEF, 2AEF, 2AF, S2B, S2BD, S2BDE, 2BF, 2BDF, 2BDEF or 2BEF the value must be 5 . Where the Meter Type is prefixed with S2C the value must be 6 . Where the Meter Type is 2CDEF, 2CF, 2CDF or 2CEF the value must be 6 .

This text is being removed from BSCP706 and also needs to be removed from the Data Specification.
As above.
Discussions within the MHHS Expert Group are in favour of this solution.

Related items

-
-
-
No details provided

Impacts

No details provided
Achieving Net Zero, Other (please provide details in Additional information box below)
This problem is preventing around 250,000 MPANs from transitioning into the MHHS arrangements.
No details provided
-
No details provided
-
No details provided
-
Market Message Catalogue
-
No details provided
-
No details provided
-
Distribution Network Operators, Energy Suppliers, Meter Operator Agent
Impacts ERDAs rather than DNOs
Balancing and Settlement Code (BSC)
Linked to BSC CP1622
-
No details provided

Priority & timing

No
Yes – BSC CP1622 is targeting June 2026 implementation, and these should be aligned
-
-
No details provided
Achieving Net Zero, Other (please provide details in the Additional information box below)

Activity

Raise alternative Change Proposal
Change Process user guide