The Clock: 29 October 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
  
  • NEW! First successful migrations & Week 1 progress
• Participant Checklist
  
  • NEW! Timelines for upcoming Qualification activities by Wave  
  • REMINDER: Systems Integration Testing (SIT)-A Environment Closure  
  • REMINDER: Closure of SIT housekeeping activities  
  • NEW! MHHS Qualification Christmas working arrangements 
• Guidance Documents
  
  • NEW! Qualification Assessment Document (QAD) Guidance Document 
• Upcoming events
  
  • Upcoming Governance Meetings 
• What happened last week?
  
  • Last week's Governance Meetings 
• Elexon & Data Integration Platform (DIP) Manager Update
  
  • NEW! DIP Manager drop-in session: 31 October 2025 
  • REMINDER: Modification P487 Send Back Consultation: Incentive of Balancing & Settlement Code (BSC) Supplier Parties to meet the Milestone (M15) MHHS Milestone   
  • ICYMI: Elexon Webinar: Confidential Assurance Reporting Platform (CARP) New Reports: 16 October 2025  
  • NEW! Notification of System Changes Impacting DIP Users Guidance  
• Retail Energy Code (REC) Update
  
  • NEW! REC guidance on using Secure Data Exchange Portal (SDEP) to raise MHHS queries with the Supplier Meter Registration Service (SMRS) 

The Clock

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