Image of back arrow Back to filtered results

XRN 5458
Urgent Modification 0791 - Contingency Gas Procurement Arrangements when a Supplier acts under a Deed of Undertaking

Last Updated
10 Jun 2022
Release Type
Implementation Date
31 Mar 2022
Proposer National Grid NTS Impacted DSC service area

Service Area 8 (Current Apr 21)

Energy Balancing (Credit Risk Management)

Customer Change Team Leader


This Change Proposal has been raised to deliver the requirements associated with the Modification 0791 proposed process.

UNC Modification 0791 - Contingency Gas Procurement Arrangements when a Supplier acts under a Deed of Undertaking has been raised with Urgent status.

The Modification seeks to introduce new arrangements to enable National Grid NTS to procure gas where, following the termination of a Shipper User providing shipping services to one or more Gas Suppliers, no new Shipper User (a ‘Registered User’) is appointed and one or more of the Suppliers acts in accordance with its deed of undertaking until such time a new Registered User is in place.

The Modification proposes to create a new role for National Grid NTS, separate to its role as residual balancer, under which it would be obliged to procure gas to meet the forecast demand of Terminated Supply Meter Points that are temporarily without a Registered User (i.e. a Shipper). The target quantity of gas to be procured for each Day by National Grid NTS as the Contingency Procurer of Supplier Demand (CPoSD) in the period for which the arrangements apply would be the aggregate forecast demand of the Terminated Supply Meter Points, net of any trades enacted against the terminated shipper’s imbalance account provided for under Modification 0788 ‘Minimising the Market Impacts of Supplier Undertaking Operation’.

Impacted Customer Types

  • NGT
  • Shipper


Document title Comment Last updated CHMC outcome
Change Proposal Approved 29/03/2022 Approved to Capture on 08/12/2021
Initial Review Stage not used N/A N/A
DSG Discussion N/A 29/03/2022 N/A
High Level Solution Options Stage not used N/A N/A
Solution Review Stage not used N/A N/A
Detailed Design For Information 29/03/2022 Change Pack sent for information
Evaluation Quotation Reports (EQR) Stage not used N/A N/A
Business Evaluation Reports (BER) Stage not yet reached 15/01/2019 BER approved at February ChMC on 09/02/2022
Change Completion Reports (CCR) Approved 10/06/2022 CCR approved at ChMC on 08/06/2022

Related Information


Initial Review
Start: 08/12/21
Status Change Proposal Raised
Approved To Capture 08/12/21
Status ChMC approved into Capture
Solution Consultation
Expected: 00/00/00
Status Stage not used
Awaiting Delivery
Detailed Design Change Pack Issued for Information 17/01/22
Status Change Pack Issued
In Delivery
BER approved at February ChMC 09/02/22
Status BER Approved
Implemented on 31/03/22
Status All planned activities have now been completed

Contact the Change Team

Need to get in touch with a member of the Change Team?

You can email us at: and we'll get back on the same day between the hours of 9:00am to 4:30pm.