The Clock: 10 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
  
  • NEW! Request for urgent response to Milestone 10 (M10) contingency scenarios and plans impact assessment 
  • NEW! Industry Standing Data (ISD) version 12 publication coming soon!
  • NEW! New governance framework arrangements & information
• MHHS Transition Update
  
  • REMINDER: Milestone 10 (M10)/M11 Cutover status reports 
  • NEW! Self-declaration timelines
  • REMINDER: Data Cleanse activities  

• MHHS Qualification Update
  
  • REMINDER: Timelines for upcoming Qualification activities by Wave
  • NEW! Key Qualification Timelines - Wave 2 spotlight
  • NEW! Process for notifying participants of updates to Qualification Test Cases (QTCs)
  • NEW! Qualification Testing (QT) lessons learned 

• MHHS Migration Update
  
  • NEW! Dress Rehearsal 2 next steps
• Guidance Documents
  
  • NEW! Data Integration Platform (DIP) Guidance on the Supplier of Last Resort (SoLR) process
• Upcoming events
  
  • Upcoming Governance Meetings 
  • REMINDER! MHHS Webinar: Migration Sprint 0: 18 September 2025 
• What happened last week?
  
  • Last week's Governance Meetings 
  • Wednesday 3 September 2025: Programme Steering Group (PSG)
  • Wednesday 3 September 2025: Qualification and End-to-end (E2E) Working Group (QWG) 
• Elexon & Data Integration Platform (DIP) Manager Update
  
  • REMINDER: DIP Manager Risk Operating Plan (ROP) 2025/26 Consultation  
  • NEW! Elexon Helix update on the Industry Standing Data (ISD) Service

  • REMINDER: Data Integration Platform (DIP) Manager Open Day: 17 September 2025  

• Retail Energy Code (REC) Update 

  • NEW! Electricity Enquiry Service (EES) MHHS Cutover activity  

  • The Clock

To sign up to The Clock, please use the 'Sign Up' button in the footer on any of the pages on the website. You will then receive the latest issue by email every Wednesday.