The Clock: 25 June 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
  
  • Readiness Assessment 5/6 Update 
• Participant Checklist
  
  • REMINDER: Systems Integration Testing (SIT) Functional & Migration Exit Reports 
  • REMINDER: Change Request CR062 issued for Impact Assessment 
  • REMINDER: Milestone 8 (M8) Code Changes Artefacts issued for formal Code Body consultation 
  • NEW! Data Cleanse activities  
  • REMINDER: Migration Supplier Submission 2 Supplier Self-Certification   
  • NEW! Migration Supplier Submission Round 2 – What’s next?  
  • NEW! Schedule of Planned Kestrel Deployment Outages 
• MHHS Qualification Updates
  
  • REMINDER: Initial Qualification Assessment Document (QAD) Submission for Wave 1 participants 
  • REMINDER: Qualification Testing (QT) Entry Checkpoints 1 and 2 for Wave 1 participants  
  • NEW! Non-Systems Integration Testing (SIT) QT Scenarios and Cases for Functional Batches 1, 2 and 3 
  • NEW! Facilitating Engagement between Suppliers and Agents – another opportunity to opt in to your information being published in the Central Register 
• Guidance Documents
  
  • NEW! Updated Qualification Assessment Document (QAD) Guidance Document 
  • NEW! Updated Qualification Test Catalogue (QTC) including enhanced guidance  
  • NEW! Non-SIT Supplier and Agent Qualification Testing (QT) Required Qualification Test Case (QTC) Set for Qualification – No Placing Reliance  
• Upcoming events
  
  • Upcoming Governance Meetings
  • Extraordinary Systems Integration Testing Advisory Group (eSITAG): 26 June 2025  
  • Programme Steering Group (PSG): 2 July 2025 
• What happened last week?
  
  • Systems Integration Testing Advisory Group (SITAG): 18 June 2025  
  • Migration drop-in session: 18 June 2025 
  • Qualification Advisory Group (QAG): 19 June 2025 
  • Qualification Testing Framework (QTF) Onboarding & Training Webinar: 24 June 2025  
• Elexon & DIP Manager Update 
  
  • REMINDER: Data Integration Platform (DIP) Change Consultation: DCR0003   
  • REMINDER: Industry Standing Data (ISD) changes at MHHS Programme Milestone 10 (M10) 
  • NEW! Updated DIP Guidance documents now available!   
  • NEW! Clarifying GlobalSign Registration for organisations with multiple companies 
• Retail Energy Code (REC) Update
  
  • REMINDER: REC Consultation on New Metering Guidance Documents 
  • REMINDER: REC Consultation for REC Change Proposal (CP) R0241: MHHS Incremental Changes for go live 
  • REMINDER: REC MHHS Webinar: New Meter Configuration Tables: 9 July 2025  
  • NEW! MHHS Electricity Enquiry Service (EES) Live Demo: 15 July 2025  
  • REMINDER: REC Release for MHHS Milestone 8 (M8) Pre-release Webinar: 16 July 2025 
  • REMINDER: Retail Energy Code (REC) Code Manager Legacy Assurance Director Assertion

The Clock

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