The Clock: 20 May 2026

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:

• New Senior Responsible Owner for the MHHS Programme
• Programme News
  
  • NEW! Non-Systems Integration Testing (SIT) Suppliers have started migrating this week! 
  • NEW! Participant progress through the MHHS journey 
  • NEW! Balancing & Settlement Code (BSC) Modification P487 Update
• Participant Checklist
  
  • NEW! Upcoming deadlines for Migration Pathways
  • REMINDER: MHHS Milestone 16 (M16) Settlement Timetable Consultation
  • NEW! Update to Qualification Approach & Plan (QA&P) Annex 4 Consultation 
  • NEW! Migration Update
  • NEW! Participant Lessons Learned Central Repository updated
• Guidance Documents
  
  • NEW! Elexon Service Operations Manual v3.0 published 
  • NEW! Data Integration Platform (DIP) Manager Early Onboarding and Connection Smoke Testing guidance   
• Upcoming events
  
  • Upcoming Governance Meetings
• What happened last week?
  
  • Last week's Governance Meetings

The Clock

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