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XRN 5605
Amendments to the must read process (IGT159V)

Last Updated
26 Feb 2024
Release Type
Implementation Date
24 Feb 2024
Proposer Xoserve Impacted DSC service area

Service Area 4 (Current Apr 21)

Meter Read/Asset processing

Customer Change Team Leader


This Change Proposal has been raised to deliver the requirements set out under IGT UNC Modification 159V – Amendments to the must read process.

This Modification was raised to update the IGT must read process to include timescales for a site to enter the process and to introduce timeframes for procuring and returning a read that align with read validation.

The Change Proposal will amend the IGT must read process in line with the Modification IGT159V requirements which includes the following:

• Placing a timeframe on the must read being provided by the IGT to ensure is aligns with the current validation window.

• Allowing Shippers a mechanism to exclude SMPs from the IGT must read process which have a known meter issue preventing reads being obtained.

• Excluding SMART, AMR and DCC Active SMPs from being included in the IGT must read process.

• Where there is a SoLR or Change of Shipper event, allow a 4 month pause in the relevant SMP(s) entering the IGT must read process.

• Ensuring PAC are provided the relevant information about the IGT must read process.

Please note, Ofgem approved the implementation of IGT159V on the 02 December 2022.

Impacted Customer Types

  • Shipper
  • IGT


Document title Comment Last updated CHMC outcome
Change Proposal CP raised 13/01/2023 Approved at ChMC 11th January 2023
DSG Discussion N/A 20/11/2023 N/A
High Level Solution Options N/A 22/05/2023 N/A
Solution Review 3177 - VO - PO 16/06/2023

Deferred at ChMC 09/06/23 due to parties wishing to fully review all representations prior to voting.

Solution Option 1b approved at E-ChMC 16/06/23

Detailed Design 3213.3 - VO - PO 14/09/2023

Approved at ChMC 13/09/2023

February 24 Release e-learning Online e-learning course 12/02/2024


Evaluation Quotation Reports (EQR) Stage not required   N/A
Business Evaluation Reports (BER) For approval 16/10/2023 Approved at ChMC 11/10/23
Change Completion Reports (CCR) Stage not yet reached   N/A


Initial Review
CP raised 22/12/22
Status CP will be presented at ChMC for approval at ChMC to proceed into Capture
Approved into capture 11/01/23
Status January ChMC approved into Capture
Solution Consultation
Solution Review Change Pack Issued 22/05/23
Status Deferred at ChMC 09/06/23. Solution Option 1b approved at E-ChMC 16/06/23
Awaiting Delivery
Detail Design Change Pack issued 14/08/23
Status Detailed Design approved at ChMC 13/09/202
In Delivery
In delivery 14/09/23
Status Awaiting
Expected: 24/02/24
Status Successfully Implemented

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