REC Publishes Q&A and Slides for I0230 & I0261 Session – Responses Invited

The Retail Energy Code (REC) has published the slide deck and Q&A responses from the joint I0230 and I0261 Q&A session, held on 19 November 2025. These materials are now available to all stakeholders via the REC Portal.

Session Overview

The session, hosted by he REC Code Manager team, addressed two key REC issues impacting Meter Asset Providers (MAPs) and Meter Operator Agents (MOAs):

I0230 – D0303 Flow Following MHHS Design Changes:
The “Effective from Settlement Date” (J0049) in the D0303 flow has changed from mandatory to optional, following Market-wide Half-Hourly Settlement (MHHS) design changes. This adjustment may impact MAPs’ ability to accurately invoice suppliers, as critical data may not always be available.
I0261 – Addition of Export Flag in D0303 Flows:
The rise in microgeneration has led to the creation of Export MPANs, complicating installation flows and increasing manual checks for MAPs. The proposal seeks to introduce an export flag in the D0303 flow to streamline operations and reduce errors.

Published Materials

The following documents are now available on the REC Portal:

I0230 I0261 Q&A session

Joint Information Request – How to Respond

A joint information request covering both I0230 and I0261 has been published and can be accessed from the Information Request Register on the REC Portal.

I0230 – (D0303 flow following MHHS design changes) and I0261 – (Addition of Export flag in D0303 flows)

Responses are invited by 05 December 2025.

Key Q&A Highlights

Accessing the EES API:
MAPs can apply for access via the REC Portal under Organisation Management > Make an Application. Approval typically takes around three months, subject to completion of information security and data protection assessments.
Data Privacy:
Portfolio extracts can exclude address information if required, and MAPs can request only the data they need. Address is an allowed data item as set out in the REC Data Access Matrix.Change Dependencies:
The change to add Supplier Effective From Date to the IF-036 Market Message has been descoped as a REC Change, as IF-036 is owned by the Balancing and Settlement Code (BSC). Any future changes will require further coordination.