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 agree 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
  • • 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].



The first two Level 4 Working Group meetings, the Business Process and Requirements Working Group (BPRWG) and the Technical Design Working Group (TDWG) took place on 3 and 4 November. Thank you to all those who attended, it was great to see so much engagement from across all industry parties.

The purpose of the sessions was to set out the approach to the MHHS design activity. This will be industry-led and aims to reach consensus across all industry parties at the Working Group level before recommending the design artefacts for approval at the Design Advisory Group (DAG). The Working Groups are a great opportunity to get involved in influencing the design to ensure that it works for everyone and we welcome subject matter experts from across all industry parties and service providers. There is still time if you are interested in getting involved, so please get in touch with us at [email protected].

Following the initial Working Group sessions the detailed design activity has now started:

BPRWG: The first Smart Market Segment Sub-group meeting took place on Thursday 11 November, while the first Registration Sub-group meeting is on Tuesday 16 November.

TDWG: The first TDWG Sub-group meeting is on Thursday 18 November to review and agree the Design Principles and Assumptions.

Weekly meetings are now 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.