Looking for information on MHHS Design?

Click here to visit the MHHS Design webpage dedicated to the Design journey so far. You’ll find key information and documents including:

  • • End-to-End Design Artefacts Libraries for industry review
  • • Design Artefact Review Support Documents
  • • Design Playback Sessions Schedule & Booking

Delivering outcomes to support a more cost-effective electricity industry

Climate change presents the world with a challenge to urgently protect our planet, our economy and our populations.

The UK has set a world-leading net zero target, the first major economy to do so. Having set the target, the focus turns to delivering against that target. In the Energy White Paper ‘Powering our Net Zero Future‘ the government has set out an ambitious programme to build a fairer greener energy system.

Market-wide Half-Hourly Settlement (MHHS) is a key enabler of the flexibility to support the transition to Net Zero. The MHHS Programme will contribute to a more cost-effective electricity system, encouraging more flexible use of energy and helping consumers lower their bills.

Introduction from MHHS Programme SRO

Market-wide Half-Hourly Settlement (MHHS) reform will see the electricity industry working together in a significant move forward in how electricity is used and accounted for.

The MHHS Programme is an industry first, in that Ofgem has placed responsibility on the industry to deliver the Programme and made Elexon the Senior Responsible Owner (SRO) of the Programme.

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Introduction from MHHS Programme Sponsor Ofgem

Ofgem’s 2021/22 Forward Work Programme set out five strategic priorities, including to deliver full chain flexibility in how we generate, use and store energy. One of the key activities within that strategic priority is to implement MHHS. This will be a vital enabler of the flexibility to support this country’s transition to net zero.

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MHHS Programme Plan

MHHS Interim Plan on a Page (POAP)

The MHHS Interim Plan on a Page follows Ofgem’s approval of CR001 on 21 April 2022 and CR003 on 18 May 2022. The Interim Plan will be revised when and if CR009 is approved, which would move milestones M5 (physical designed baseline approved) and M3 (Participants mobilised and ready for Design, Build and Test) to the end of October 2022.

On Monday 1st August 2022, the MHHS Programme team opened the first of three rounds of consultation on the Replan. Round 1 will take place between 1 August – 26 August and focuses on selected high-level planning artefacts published for consultation, provided to improve consensus on plan structure, activity durations and sequencing, and to test high-level assumptions, dependencies, and related risks. More information can be found on the Planning page.

MHHS Programme Communications

This MHHS website is being developed to support the industry with information at both summary and detail level on this Programme.

The MHHS website will be the primary and central communications tool for the Programme and will support the sharing of intelligence with all stakeholders throughout the lifetime of the Programme.

The MHHS website will evolve to meet the needs of the industry as the Programme mobilises. Content will be updated regularly to ensure participants have the information they need to lead their delivery programmes.

The Clock (MHHS Programme)
The Clock newsletter provides participants with updates and key information to support delivery of the Market-wide Half-Hourly Settlement Programme. The Clock will signpost you to events, plans, reports and documents to assist in planning, design, development, testing and delivery.

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