The Clock: 30 July 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
  
  • Programme Design mailbox and Artefact transition 
  • Baselined MHHS Implementation Timeline: Plan on a page (Poap) 
• Participant Checklist
  
  • REMINDER: Milestone 8 (M8) Code Changes Artefacts issued for formal Code Body consultation 
  • REMINDER: Timelines for upcoming Qualification activities by Wave  
  • NEW! Baselined Migration Schedule published 
  • NEW! Migration Licensed Distribution System Operator (LDSO) aggregation  
  • NEW! Smart Data Service (SDS) Design Requirements Traceability Matrix (RTM)   
• MHHS Testing Updates
  
  • NEW! Systems Integration Testing (SIT) timelines by Pathway 
  • REMINDER: Overarching SIT Non-Functional Exit Reports Industry Review   
• MHHS Transition Updates
  
  • REMINDER: Helix Service Operating Manual and Low-Level Service Design (LLSD) Consultation   
  • NEW! Various Transition Artefacts published and upcoming engagement sessions 
• Guidance Documents
  
  • NEW! MHHS Work Off Plans Guidance Note published  
• Upcoming events
  
  • Upcoming Governance Meetings 
  • REMINDER: MHHS Webinar: Kestrel Rehearsal 2: 6 August 2025  
  • REMINDER: Migration Dress Rehearsal 2 drop-in sessions: August 2025  
• What happened last week?
  
  • Last week's Governance meetings
• Code Bodies update
  
  • REMINDER: Retail Energy Code (REC) Code Manager Legacy Assurance Director Assertion - one week to go! 
  • NEW! Elexon’s Confidential Assurance Reporting Platform (CARP) launches tomorrow! 

The Clock

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