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've pulled together a Q&A document capturing questions that were asked throughout the day. You can view this below:

MHHS Open Day Q&A

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

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MHHS Webinars Calendar

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

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  • April
    23
    Thursday
    IPA Webinar: Consequential Change PPIR
    Go to Sharepoint

    Please note this Webinar is being held on behalf of the IPA and not the MHHS Programme:

    This webinar invite has been issued to all Programme Participants in Migration Pathways 1 - 12, which includes Suppliers & Agents and Third-Party Service Providers.

    The IPA invite you to attend a webinar on Thursday 23 April 2026, 1 - 2 pm to walk through the upcoming Consequential Change PPIR which will be issued on Friday 1 May 2026.

    All participants are encouraged to attend the webinar to understand more about the intended outcomes and key considerations for responding to the PPIR. The supporting guidance pack that will be issued alongside the PPIR will be presented at the webinar.

    The webinar will be recorded and the recording uploaded to the MHHS website and Programme Collaboration Base for participants to revisit at leisure. 

  • April
    29
    Wednesday
    MHHS Webinar: M16 Settlement Timetable Consultation
    Go to Sharepoint

    This webinar invite has been issued to all Programme participant Principal Contacts.  Participants may want to ensure that those representatives within their organisation interested in settlement system or operations attend this webinar. 

    This webinar is in support of the upcoming M16 Settlement Timetable Consultation.

    To support delivery of the Ofgem-directed M16 settlement timetable reduction, the Settlement Timetable Expert Group (STEG), has been developing reporting frameworks and success criteria to enable informed decision-making.

    The Programme and STEG are now seeking input from industry stakeholders to ensure the proposed reporting and decision criteria are robust and appropriate, ahead of making a recommendation to Migration and Cutover Advisory Group (MCAG) in June.

    Given the complex and technical nature of this topic:

    •  The consultation period has been extended to four weeks, running from 29 April to 26 May, (subject to MCAG approval).

    •   The consultation will be supported by this explainer webinar on 29 April.  The webinar will take participants through the history, a detailed overview of the M16 approach and delivery process, the STEG consultation and next steps.  The webinar recording and presentation material will be published on the MHHS Website and Collaboration Base pages. 

    •    Participants will be supported by three question and answer sessions on 6 May, 13 May and 20 May.   The sessions will be open to any participant interested in settlement system or operations and will give participants an opportunity to ask questions.  Or parties can submit their questions to PPC@mhhsprogramme.co.uk.  A question-and-answer repository will be presented at the QA sessions and maintained centrally and published on the MHHS Website and Collaboration Base pages. 

    Further related information below:

    The Settlement Timetable Expert Group (STEG) is a technical expert Subgroup that sits under the Migration & Cutover Advisory Group (MCAG). STEG is responsible for developing and delivering work related to implementing the new Settlement Timetable, (Milestone M16: Cutover to the new Settlement Timetable).  As part of these responsibilities to deliver the Ofgem directed MHHS Target Operating Model (TOM), the M16 Programme milestone introduces a new Settlement Timetable that:

    •  Reduces the Final Reconciliation (RF) period from 14 months to seven months, and subsequently to four months; and

    •  Changes the first financial settlement run (SF) from 15 Working Days (WD) to seven WD.

    The Transition Design sets out an initial decision point in October 2026 to implement the RF reduction to seven months (applicable to Settlement days from October 2026) in the Settlement Calendar live from 1 April 2027.   Further decision points in Q1 2027 will implement the RF reduction to four months and change of the SF run to seven WD (in a further Settlement Calendar).

    The STEG have developed the data and criteria required to support decision-making at the Transition Design decision points.  This includes monitor settlement and migration data on an ongoing basis, including related issues, to inform recommendations on implementing the new Settlement Timetable. 

    Following the STEG M16 consultation and the subsequent MCAG approval, STEG will monitor and report the agreed settlement and migration data, against the agreed criteria, before making the October, April and May recommendations 


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

 


Migration Troublesome MPANs PPIR drop-in session 4: 12 March 2026

Webinar recording


Migration Troublesome MPANs PPIR drop-in session 3: 5 March 2026

Webinar recording


Migration Troublesome MPANs PPIR drop-in session 2: 26 February 2026

Webinar recording


Migration Troublesome MPANs PPIR drop-in session 1: 19 February 2026

Webinar recording


MHHS Webinar: End-to-end (E2E) Participant Journey, Migration Pathways & Industry Standing Data (ISD) Publish Programme Participant Information Request (PPIR): 21 January 2026

Webinar slides

Webinar recording


MHHS Qualification Wave 4 Webinar: 9 December 2025

Webinar slides

Webinar recording

Webinar Q&A


MHHS Webinar: Migration Sprint 0: 18 September 2025

Webinar slides

Webinar recording



MHHS Kestrel Dress Rehearsal 2 drop-in sessions: 13, 20, 27 August & 3 September 2025

Webinar recording: 13 August 2025

Webinar recording: 20 August 2025

Webinar recording: 27 August 2025

Webinar recording: 3 September 2025


MHHS Webinar: Kestrel Dress Rehearsal 2: 6 August 2025

Webinar slides

Webinar recording


Non-Systems Integration Testing (SIT) Supplier & Agent Qualification Testing Defect Management Process: 21 July 2025

Webinar slides

Webinar recording

Webinar Q&A


MHHS Webinar: MHHS Qualification - Promotion to Production: 15 July 2025

Webinar slides

Webinar recording

Webinar Q&A


MHHS Webinar: MHHS Migration Kestrel Dress Rehearsal 2: 14 July 2025

Webinar slides

Webinar recording


Data Integration Platform (DIP) Onboarding Q&A: 1 July 2025

Webinar slides

Webinar recording

Webinar Q&A


Systems Integration Testing (SIT) Regression Ways of Working Q&A: 1 July 2025

Webinar slides

Webinar recording


Qualification Testing Framework (QTF) Onboarding and Training Webinar: 24 June 2025

Webinar slides

Webinar recording

Webinar Q&A

Qualification Testing Framework User Guide


MHHS Webinar: Migration Drop-in Session: 18 June 2025

Webinar recording


MHHS Webinar: Migration Drop-in Session: 28 May 2025

Webinar recording


MHHS Webinar: Migration Drop-in Session: 16 May 2025

Webinar recording


MHHS Webinar:  SIT-A - Settlement Testing and Readiness Workshop: 12 May 2025

Webinar slides

Webinar recording


MHHS Webinar:  Data Integration Platform (DIP) Onboarding Webinar: 6 May 2025

Webinar slides

Webinar recording

 


MHHS Webinar:  MHHS Migration Submission Webinar (Kestrel): 23 April 2025

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MHHS Webinar:  Test Data – Regression /Settlement /Sandbox Data Loading Approach: 17 April 2025

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MHHS Webinar:  Test Data – SIT Non-Functional & SIT Operational Data Load Retrospective: 16 April 2025

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MHHS Webinar:  Readiness Assessment 5/6: 3 April 2025

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Webinar recording

Webinar Q&A


MHHS Webinar:  Overview of new Azure DevOps (ADO) Defect Statuses: 21 February 2025

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MHHS Webinar:  New Connections Follow-up Workshop: 4 February 2025

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MHHS Webinar:  New Connections Workshop: 23 January 2025

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MHHS Webinar:  Enhancements Azure DevOps (ADO) Test Case Description: 19 December 2024

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MHHS Webinar:  Data Loading Retrospective for Systems Integration Testing (SIT) Non-Functional Cycle 3: 19 December 2024

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MHHS Webinar:  Systems Integration Testing (SIT) Functional Test Rationalisation Walkthrough: 17 December 2024

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MHHS Webinar:  Qualification Assessment Document Guidance: 14 November 2024

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Webinar Q&A


MHHS Webinar:  MHHS Programme Planning Dialogue Session: 12 September 2024

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Webinar Q&A


MHHS Webinar:  Supplier Migration Plan Walkthrough: 6 August 2024

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Webinar Q&A


MHHS Webinar:  Supplier Capacity Envelopes Walkthrough: 5 August 2024

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MHHS Webinar: Non-Systems Integration Testing (SIT) Licensed Distribution System Operator (LDSO) Data Integration Platform (DIP) Onboarding: 26 July 2024

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Webinar Q&A



Qualification Assessment Document (QAD) Walkthrough Webinar: 29 May 2024

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Qualification Assessment Document Webinars Q&A


MHHS Walkthrough: Pre-Integration Testing (PIT) Guidance: 4 April 2024

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Webinar Q&A


MHHS Webinar: Change of Supplier process: 12 March 2024

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Webinar Q&A


MHHS Webinar: Pre-Qualification Submission: 7 March 2024

Webinar slides

Webinar recording

Webinar Q&A v4.0


MHHS Webinar: Data Integration Platform (DIP) Demo: 7 September 2023

Webinar recording

Webinar Q&A


MHHS Webinar: Change Control Overview: 27 July 2023

Webinar slides

Webinar recording

Webinar Q&A