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XRN 5443
Urgent Modification 0788 - Minimising the market impacts of ‘Supplier Undertaking’ operation

Last Updated
16 Feb 2022
Release Type
Implementation Date
01 Nov 2021
Proposer National Grid NTS Impacted DSC service area


To be confirmed

Customer Change Team Leader


Modification 0788 - Minimising the market impacts of ‘Supplier Undertaking’ operation has been raised and been granted Urgent status by Ofgem.

The Modification seeks to provide the ability for Suppliers who are operating under a Deed of Undertaking following the Termination of the Shipper User, to make arrangements with another Shipper User to source additional supplies of gas and make trade nominations to the Terminated Shipper User account to balance that portfolio and mitigate increased costs, until a new ‘Registered User’ is appointed.


This Change Proposal has been raised to implement the solution required to deliver what is set out within the Modification.

Please note, Modification 0788 is progressing under the Ofgem directed Urgent Timetable. Ultimately the Modification will require an Ofgem decision on approval and implementation however we are proposing that this CP is progressed ahead of the final Ofgem decision to ensure immediate implementation is possible if the Modification is approved.

Impacted Customer Types

  • NGT
  • Shipper


Document title Last updated Type
CCR for XRN5443 16/Feb/2022 PDF
XRN5443 - Change Proposal 06/Dec/2021 PDF


Initial Review
Start: 27/10/21
Status Change Proposal Raised
Approved to Capture 01/11/21
Status ChMC approved into Capture
Solution Consultation
Expected: 29/10/21
Status Urgent Modification 0788 approved by Ofgem
Awaiting Delivery
Expected: 00/00/00
Status Stage not used
In Delivery
Expected: 00/00/00
Status Stage not used
Notice of Implementation 01/11/21
Status Design Change Pack issued 15th November for awareness only

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