MHHS Webinars & Open Days
MHHS Open Day: 25 March 2025
Thank you to everyone for coming to our MHHS Open Day on 25 March 2025. We were delighted that over 200 people were able to join us, either in person or virtually. The day was a big success, with engaging sessions and lots of questions asked throughout the day.
The focus of this Open Day was to build a shared understanding of Programme and participant readiness for Milestone 10 (M10) and beyond. The Programme provided an overview of key activities that need to happen to reach M10 and clarified what is required of participants beyond M10 as we move into the new arrangements.
If you couldn’t make the Open Day, or you want to remind yourself of some of the content, you can view the presentation slides below:
MHHS Open Day Presentation Slides
You can view the recordings from all the sessions via the link below. Here's a reminder of the topics covered on the day:
- Welcome & Senior Responsible Owner (SRO) Perspectives
- Ofgem Address
- MHHS Programme Update
- 26 weeks to Go Live
- Overview of Independent Programme Assurance (IPA) Milestone 10 Assurance Activities
- Participant Journey to Live Operation
- Qualification Health Check
- Feedback & Close
MHHS Open Day 2025: All recordings
We're pulling together a Q&A document that we'll publish on this page of the website. Look out for these coming soon!
Click here for a short feedback survey. We encourage you to please take five minutes to complete this. Thank you to everyone who has already responded.
If you have any other queries or you'd like to provide any additional feedback, please email us at PPC@mhhsprogramme.co.uk

MHHS Webinars Calendar
You can view a calendar for upcoming MHHS Webinars below. Any scheduled sessions will be shown below.

MHHS Webinars Slides & Recordings
If you have been unable to attend a webinar, you can access the slides and recordings via the links below to support your knowledge and delivery of the Programme.
If you have any questions, please email PPC@mhhsprogramme.co.uk
MHHS Webinar: Test Data – Regression /Settlement /Sandbox Data Loading Approach: 17 April 2025
MHHS Webinar: Test Data – SIT Non-Functional & SIT Operational Data Load Retrospective: 16 April 2025