MHHS Governance Framework

Ofgem approval of P413 – Enable Elexon to be the Programme Manager for the implementation of Market-wide Half-Hourly Settlement places an obligation on Elexon to perform the MHHS Implementation Manager role and obligations on MHHS parties to deliver the MHHS Programme.

BSC MHHS Governance Framework published
Ofgem has published the BSC MHHS Governance Framework and Update: Designating the MHHS Governance Framework.

Ofgem’s BSC MHHS Governance Framework document identifies the elements of the governance framework to enable the objectives and benefits of the MHHS Programme to be delivered as an industry-led programme. The framework is designed to enable the Programme to run efficiently and to support rapid constituency-based decision-making.

Ofgem has now transitioned the SRO role to Elexon. Ofgem will retain overall accountability for MHHS as Programme Sponsor. Ofgem will not be involved in the day-to-day management or decision-making of the Programme, but will continue to make certain decisions, if above the defined level 1 thresholds.

The MHHS Programme Governance Framework, originally developed by the MHHS Programme SRO function, following consultation with the industry, has been updated. This follows a review by the Lead Delivery Partner which was approved by the Programme Steering Group (PSG) on 2 March 2022.

If you have any questions, please email [email protected]


You can view the Market-wide Half-Hourly Settlement (MHHS) request Level 2 and Level 3 constituency representative nominations here.

Click here for full details on the nomination, election and appointment process. You can also download the nomination form here.

The meeting dates for the Level 2 and Level 3 groups are:

  • • Programme Steering Group (PSG): first Wednesday of every month
  • • Design Advisory Group (DAG): second Wednesday of every month
  • • Testing and Migration Advisory Group (TMAG): third Wednesday of every month
  • • Cross-Code Advisory Group (CCAG): fourth Wednesday of every month

For more information about the Programme decision groups, please see the MHHS Programme Governance Framework document.

If you have any questions, please email [email protected].



We are now interactively sharing our Design Artefacts with the Level 4 Working Groups in the Design Document Library on our Market-wide Half-Hourly Settlement (MHHS) Portal. The library contains all the working documents that are currently under review within the sub-working groups, and the Level 4 Working Groups, along with consolidated comments logs making it easier for everyone to contribute to the design activity. Please note, you do need to be registered on the MHHS Portal to access these links. To request Portal access, please email [email protected].

Design Artefacts have been grouped into four tranches and, once agreed in the sub-working groups, each tranche will be issued for wider review by the Level 4 Business Process and Requirements Working Group (BPRWG). The documents will then be submitted to the Design Advisory Board (DAG) for approval between now and the Design baseline at the end of July 2022. You can view the full list of documents within each Tranche here in the Design Document Library.

The Technical Design Working Group have agreed the Functional Specification and Non-Functional Requirements for the Data Integration Platform (DIP) which have been issued to bidders as part of the Request for Proposal activity, and the Security Design Working Group are reviewing the end-to-end Security Requirements.

You can find a schedule of the upcoming Working Group meetings in the Design Document Library here.

You can also view the Terms of Reference for each of the Working Groups below:

High Level Programme Structure

The Lead Delivery Partner (LDP) is required to deliver four key service roles:

1. Central Programme Team (CPT)

2. Programme Management Office (PMO)

3. Programme Party Coordinator (PPC)

4. Systems Integrator (SI)

An industry-led governance model will ensure the decision making between the SRO, Implementation Manager (IM) and MHHS Programme participants is appropriately balanced. The model will ensure that the SRO is empowered to make decisions on behalf of the industry, but is accountable to, and has engaged and consulted with MHHS Programme participants.