Programme Plan & Complementary Documents
Latest Programme Plan
As the Programme Plan is a live document, used daily on the Programme and by participants, the Programme will continue to uplift and publish an updated version of the Plan on a fortnightly basis.
On Wednesday 22 October 2025 the Programme published an uplifted version (v6.36) of the:
MHHS Programme Plan (Microsoft Project)
Please refer to column 'M/S Change Status' in the Microsoft Project file to see where new activity has been added, or existing activity has been amended or updated.
The Programme will publish version 6.37 of the planning documents on Wednesday 5 November 2025.
You can view previous versions of the Programme Plan, Outline Plan and Milestone Register on the Previous Iterations of Planning Documents page of this website.
If you have any questions, please email PMO@mhhsprogramme.co.uk
Baselined MHHS Implementation Timeline
The below Plan on a page (Poap) is the MHHS Implementation Timeline, as of 24 July 2025, that articulates the delivery stages of the Programme.
Baselined MHHS Implementation Timeline
If you have any questions, please email PMO@mhhsprogramme.co.uk
Ofgem Settlement Reform Programme Plan
Ofgem published its Market-wide Half-Hourly Settlement: Decision and Full Business Case paper on 21 April 2021 which included the MHHS Transition Timetable.
The Transition Timetable has since been updated and is now owned by the MHHS Programme.
