A Market Participant has indicated a problem with the significant delay between physical changes to QH
meters and the point in time at which the supplier is advised of the change (ie when CX111 processing is
completed and 331 MM is issued to suppliers). The 341 MMs received during the intervening period
contain the ‘previous’ QH meter details until the 331 MM issues, with an effective date in the past.

Click here to read the document.