The Clock: 17 September 2025

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

In this issue of The Clock we update you on:

• Programme News
  
  • Celebrating a major milestone: Successful completion of Programme Milestone 8 (M8): Code Drafting activity   
  • We're close to MHHS Programme Milestone 10 (M10) delivery! 
  • Industry Standing Data (ISD) Update  
  • Programme Governance Transition Post-Milestone 10
• MHHS Transition Update
  
  • REMINDER: M10/M11 Cutover status reports 
  • REMINDER: Self-declaration timelines 
  • REMINDER: Data Cleanse activities  
• Participant Checklist
  
  • NEW! Key Qualification timelines: Wave 2 spotlight  
  • NEW! Timelines for upcoming Qualification activities by Wave  
  • NEW! Systems Integration Testing (SIT) Retrospectives Summary Report published 
• Guidance Documents
  
  • NEW! Non-SIT Supplier & Agent Pre-Integration Testing (PIT) and Qualification Testing (QT) Lessons Learned FAQ Guidance 
• Upcoming events
  
  • Upcoming Governance Meetings 
  • REMINDER: MHHS Webinar: Migration Sprint 0: 18 September 2025 
• What happened last week?
  
  • Last week's Governance Meetings 
• Elexon & Data Integration Platform (DIP) Manager Update
  
  • NEW! Confidential Assurance Reporting Platform (CARP): Register before M10  
  • NEW! DIP Manager drop-in session: 19 September 2025  
  • NEW! DIP Manager online drop-in sessions for DIP Change Request DCR0004: 19 September & 3 October 2025 
  • NEW! Elexon Assurance Reporting Webinar: 16 October 2025 

The Clock

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