Red-lined Design Artefacts: Interim Release 6
Please note that as of 1 September 2025, the MHHS Programme Design mailbox, Design artefacts and the Design Issues Notification (DIN) log on the MHHS website are no longer monitored or updated. They are retained for historical reference only.
Following Milestone 8 (M8), the Target Operating Model (TOM) and MHHS Design were fully codified, and the Code Bodies no longer maintain standalone Programme artefacts. The live Code and Code Subsidiary Documents are now the single source of truth, and any changes made through Code governance will not appear in the historical documents.
You can view the latest artefacts online, directly from the respective Code Bodies websites, listed below:
Balancing & Settlement Code (BSC)
Retail Energy Code (REC)
Distribution Connection and Use of System Agreement (DCUSA)
For the latest information or to raise queries, please use the Elexon Support Portal or contact the respective Code Bodies directly.
The Red-lined Design Artefacts Interim Release 6 are available below.
The Programme has now baselined Interim Release 6 of the Design Artefacts. Clean versions of these Artefacts are published in the respective libraries of the Baselined Design Artefacts page of this website.
Red-lined Design Artefacts: Interim Release 6
| Short Name | Doc Number | Sub Type | Status | Version |
|---|---|---|---|---|
| Physical interfaces - Submit Events - yaml | E2E003 | Technical Design | Approved | v1.6 |
| Physical interfaces - Examples | E2E003 | Technical Design | Approved | v0.4 |
| Change of Service - Metering Service Business Process (redlined) | BP002 | Business Process Diagrams | Approved | v5.4 |
| Change of Service - Data Service Business Process (redlined) | BP003 | Business Process Diagrams | Approved | v5.5 |
| UMSDS EM Function Method Statement (redlined) | METH004 | Method Statements | Approved | v5.3 |
| Physical interfaces - Interfaces Event Codes - yaml | E2E003 | Technical Design | Approved | v1.6 |
| ECS Reports - External (redlined) | ERI011B | Interface Specifications | Approved | v5.5 |
| Change of Meter Business Process (redlined) | BP009 | Business Process Diagrams | Approved | v5.4 |
| Interface Catalogue (redlined) | DES138 | Interface Specifications | Approved | v5.6.1 |
| Physical interfaces - Data Types - yaml | E2E003 | Technical Design | Approved | v1.6 |
| Physical interfaces - Examples | E2E003 | Technical Design | Approved | v0.4 |
| Registration Service Requirements (redlined) | BRS003 | Unclassified | Approved | v5.4 |
| Physical interfaces - Submit Events - yaml | E2E003 | Technical Design | Approved | v1.6 |
| Physical Interfaces - Real Common Blocks - yaml | E2E003 | Technical Design | Approved | v1.6 |
| Physical interfaces - Data Catalogue - yaml | E2E003 | Technical Design | Approved | v1.6 |
| Physical interfaces - Interfaces Event Codes - json | E2E003 | Technical Design | Approved | v1.6 |
| Physical interfaces - Data Types - json | E2E003 | Technical Design | Approved | v1.6 |
| Physical interfaces - Real Common Blocks - json | E2E003 | Technical Design | Approved | v1.6 |
| Migration Design Document (redlined) | DEL961 | Unclassified | Approved | v1.1 |
| Physical interfaces - Data Catalogue - json | E2E003 | Technical Design | Approved | v1.6 |
| ECS Reports - Internal (redlined) | ERI011A | Interface Specifications | Approved | v5.5 |
| Physical interfaces - Submit Events - json | E2E003 | Technical Design | Approved | v1.6 |
| Physical interfaces - Submit Events - json | E2E003 | Technical Design | Approved | v1.6 |
| Metering Service Requirements (redlined) | BRS002 | Business Requirements | Approved | v5.5 |
| ISD Entities (redlined) | EDI021 | Supporting Document | Approved | v5.4 |
