Baselined Interim Release 7, 7.1, 7.2 and 7.3 Design Artefacts
You can view the historical Baselined Design Artefacts for Interim Release 7, 7.1, 7.2 and 7.3 in the respective libraries below.
We have listed these Artefacts in their own libraries to support participant engagement with the Artefacts.
For more information, or if you have any questions, please email Design@mhhsprogramme.co.uk

Interim Release 7.3
On Wednesday 8 May 2024, the Programme published Interim Release 7.3 Design Artefacts.
Interim Release 7.3 contains seven Design Issue Notifications (DINs), correcting errors in Elexon Central Systems (ECS) Reports and defects in Swagger ahead of Systems Integration Testing (SIT) Cycle 2 on Monday 10 June 2024.
Full details of the issues addressed are covered in the accompanying Release Note below:
Short Name | Doc Number | Sub Type | Status | Version |
---|---|---|---|---|
Physical interfaces - Data Types - yaml | E2E003 | Technical Design | Approved | v1.7.3 |
Physical interfaces - Submit Events - json | E2E003 | Technical Design | Approved | v1.7.3 |
Physical interfaces - Interfaces Event Codes - json | E2E003 | Technical Design | Approved | v1.7.3 |
Physical interfaces - Real Common Blocks - yaml | E2E003 | Technical Design | Approved | v1.7.3 |
Physical interfaces - Data Catalogue - yaml | E2E003 | Technical Design | Approved | v1.7.3 |
Physical interfaces - ECS Common Blocks - json | E2E003 | Technical Design | Approved | v1.7.3 |
Physical Interfaces - Real Common Blocks - json | E2E003 | Technical Design | Approved | v1.7.3 |
Physical interfaces - Submit Events - yaml | E2E003 | Technical Design | Approved | v1.7.3 |
Physical interfaces - Interfaces Event Codes - yaml | E2E003 | Technical Design | Approved | v1.7.3 |
Physical interfaces - ECS Reports - json | E2E003 | Technical Design | Approved | v1.7.3 |
Physical interfaces - Submit Events - json | E2E003 | Technical Design | Approved | v1.7.3 |
Physical interfaces - Submit Events - yaml | E2E003 | Technical Design | Approved | v1.7.3 |
Physical interfaces - ECS Reports - yaml | E2E003 | Technical Design | Approved | v1.7.3 |
Physical interfaces - ECS Common Blocks - yaml | E2E003 | Technical Design | Approved | v1.7.3 |
Interface Catalogue | DES138 | Interface Specifications | Draft | v5.7.3 |
Physical interfaces - Data Catalogue - json | E2E003 | Technical Design | Approved | v1.7.3 |
Physical interfaces - Data Types - json | E2E003 | Technical Design | Approved | v1.7.3 |
Interim Release 7.2
On Wednesday 3 April 2024, the Programme published Interim Release 7.2 Design Artefacts.
Interim Release 7.2 incorporates changes to Swagger.
Full details of the issues addressed are covered in the accompanying Release Note below:
Short Name | Doc Number | Sub Type | Status | Version |
---|---|---|---|---|
Physical interfaces - ECS Common Blocks - yaml | E2E003 | Technical Design | Approved | v1.7.2 |
Physical interfaces - ECS Common Blocks - json | E2E003 | Technical Design | Approved | v1.7.2 |
Physical interfaces - Submit Events - yaml | E2E003 | Technical Design | Approved | v1.7.2 |
Physical Interfaces - Real Common Blocks - json | E2E003 | Technical Design | Approved | v1.7.2 |
Physical interfaces - Data Catalogue - json | E2E003 | Technical Design | Approved | v1.7.2 |
Physical interfaces - Data Types - json | E2E003 | Technical Design | Approved | v1.7.2 |
Physical interfaces - Submit Events - json | E2E003 | Technical Design | Approved | v1.7.2 |
Physical interfaces - Submit Events - json | E2E003 | Technical Design | Approved | v1.7.2 |
Physical interfaces - ECS Reports - yaml | E2E003 | Technical Design | Approved | v1.7.2 |
Physical interfaces - ECS Reports - json | E2E003 | Technical Design | Approved | v1.7.2 |
Physical interfaces - Data Types - yaml | E2E003 | Technical Design | Approved | v1.7.2 |
Physical interfaces - Submit Events - yaml | E2E003 | Technical Design | Approved | v1.7.2 |
Physical interfaces - Data Catalogue - yaml | E2E003 | Technical Design | Approved | v1.7.2 |
Physical interfaces - Real Common Blocks - yaml | E2E003 | Technical Design | Approved | v1.7.2 |
Physical interfaces - Interfaces Event Codes - json | E2E003 | Technical Design | Approved | v1.7.2 |
Physical interfaces - Interfaces Event Codes - yaml | E2E003 | Technical Design | Approved | v1.7.2 |
Interim Release 7.1
On Wednesday 6 March 2024, the Programme published Interim Release 7.1 Design Artefacts.
Interim Release 7.1 incorporates changes to Swagger and the DES-138 Interface Catalogue.
Full details of the issues addressed are covered in the accompanying Release Note below:
Interim Release 7.1 Release Note
Baselined Interim Release 7.1 Design Artefacts
Short Name | Doc Number | Sub Type | Status | Version |
---|---|---|---|---|
Physical interfaces - ECS Common Blocks - yaml | E2E003 | Technical Design | Approved | v1.7.1 |
Interface Catalogue | DES138 | Interface Specifications | Approved | v5.7.2 |
ECS Reports - External | ERI011B | Interface Specifications | Approved | v5.6.1 |
Physical interfaces - Examples | E2E003 | Technical Design | Approved | v0.5 |
End to End Solution Architecture | E2E001 | Technical Design | Approved | v3.6.1 |
End to End Non Functional Requirements | E2E002 | Technical Design | Approved | v3.2 |
Physical interfaces - Submit Events - json | E2E003 | Technical Design | Approved | v1.7.1 |
Physical interfaces - Examples | E2E003 | Technical Design | Approved | v0.5 |
ISD Entities | EDI021 | Supporting Document | Approved | v5.5.1 |
Physical interfaces - ECS Reports - json | E2E003 | Technical Design | Approved | v1.7.1 |
Physical interfaces - Interfaces Event Codes - yaml | E2E003 | Technical Design | Approved | v1.7.1 |
Physical interfaces - Data Types - yaml | E2E003 | Technical Design | Approved | v1.7.1 |
Physical interfaces - Data Catalogue - json | E2E003 | Technical Design | Approved | v1.7.1 |
ISD Entities (redlined) | EDI021 | Supporting Document | Approved | v5.5.1 |
Physical interfaces - Data Types - json | E2E003 | Technical Design | Approved | v1.7.1 |
Physical interfaces - ECS Common Blocks - json | E2E003 | Technical Design | Approved | v1.7.1 |
Physical interfaces - Data Catalogue - yaml | E2E003 | Technical Design | Approved | v1.7.1 |
Physical interfaces - Submit Events - yaml | E2E003 | Technical Design | Approved | v1.7.1 |
Physical interfaces - Interfaces Event Codes - json | E2E003 | Technical Design | Approved | v1.7.1 |
Physical interfaces - ECS Reports - yaml | E2E003 | Technical Design | Approved | v1.7.1 |
Physical interfaces - Submit Events - yaml | E2E003 | Technical Design | Approved | v1.7.1 |
Physical interfaces - Submit Events - json | E2E003 | Technical Design | Approved | v1.7.1 |