This explains the impact of migrating to MHHS during British Summer Time, including how appointments, meter reads and settlement periods are affected when local time does not align with UTC.

<div data-id="mhhs-cr036--use-of-clock-midnight-for-appointments-and-reads" style="text-align:left">MHHS CR036 – ‘Use of Clock Midnight for Appointments and Reads</div>

<div data-id="reads-no-longer-align-to-clock-midnight" style="text-align:left">Reads No Longer Align to Clock Midnight</div>

<div data-id="impacts-during-migration" style="text-align:left">Impacts During Migration</div>

<div data-id="migration-from-nhh-to-mhhs-smart-market-segment" style="text-align:left">Migration from NHH to MHHS <u class='defined-term'>Smart Market Segment</u></div>

<div data-id="guidance-for-smart-data-services" style="text-align:left">Guidance for <u class='defined-term'>Smart Data Service</u>s</div>

<div data-id="migration-from-hh--advanced-market-segment" style="text-align:left">Migration from HH → <u class='defined-term'>Advanced Market Segment</u></div>

<div data-id="materiality" style="text-align:left">Materiality</div>

CONTENTS

Migration to MHHS During BST V1.0

Defined Terms

Cross-references