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, developed by Elexon following consultation with the industry, was approved by the Programme Steering Group (PSG) at the inaugural meeting on 10 November 2021.

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


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

The first Level 2 and Level 3 governance meetings were held in November. The initial meetings were a ‘meet and greet’, where a Programme update was provided and gave everyone the opportunity for introductions, and to ensure representatives understood their roles and responsibilities within the groups.

The future meeting dates were agreed at PSG:

  • • Programme Steering Group (PSG): first Wednesday of every month
  • • Implementation Advisory Group (IAG): agreed not to stand up
  • • Design Advisory Group (DAG): second Wednesday of every month
  • • Testing Advisory Group (TAG): 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 have completed the first month of activity within the Level 4 Working Groups and are making good progress.

The focus for the Business Process Requirements Working Group (BPRWG) has been to initially review the core Business Process Diagrams for the Smart Market Segment and Registration sub-groups which has generated a lot of feedback so thank you to everyone who has contributed to these sessions.

The MHHS Design Team are now working through all of the comments received from the various sub-working groups and we will share the updated processes shortly. Design activity has also started for the Elexon Central Systems sub-group focusing on reviewing the Business Process Diagrams and related business requirements. Meanwhile, the Technical Design Working Group (TDWG) has completed a review of the Design Principles and Non-Functional Requirements.

Following the appointment of our Lead Delivery Partner, we are now working closely together to ensure that all of our Design artefacts and working documents are published and easily accessible to everyone. More information on this coming soon so watch this space!

Weekly meetings have been scheduled for all the Sub-groups and you can find these in the Level 4 Working Group calendar. You can also find the full list of Business Processes that are in scope here.

We also plan to set up the Security Working Group over the next couple of weeks. We are looking for subject matter experts from across all market participants with knowledge of security architecture, data security, security incident management, or operational security, so if you would like to join, please get in touch with us.

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

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.