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XRN 5695
Revision of Virtual Last Resort User and Contingent Procurement of Supplier Demand Event Triggers (Modification 0854)

Last Updated
18 Dec 2023
Release Type
Implementation Date
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 has been raised to deliver the requirements set out under UNC Modification 0854 – Revision of Virtual Last Resort User and Contingent Procurement of Supplier Demand Event Triggers.


This Modification has been raised to allow the utilisation of Revision of Virtual Last Resort User (‘VLRU’) and Contingent Procurement of Supplier Demand (‘CPSD’) mechanisms where a User is subject to UK Government sanctions.


The Change Proposal will implement a process to deliver the Modification 0854 requirements which involve the following:

- National Gas Transmission can issue a User Premises Termination Notice (UPTN) when a User is sanctioned by the UK Government..

- Once National Gas Transmission have issued the UPTN, the CDSP will issue a notice to the industry (on NG NTS’s behalf) stating that the relevant User has become a Premises Termination User (PTU).

- The existing User Termination process will be mirrored for a Premises Termination User with the exception that the User MUST be suspended and not terminated (i.e. it will remain party to the UNC).

- In respect of the relevant Supply Points, the VLRU and CPSD processes will be available to Supplier (acting under a DoU) and National Gas Transmission respectively.

- All CDSP systems and services will be suspended for the Premises Termination User from the UPTN effective date which is anticipated to fall in line with the start of the next applicable Gas Day.

- RECCo and the Central Switching Service will be responsible for determining next steps re. their own systems and services for the Premises Termination User.

- For NTS Supply Meter Points the NTS Exit Capacity should not allow the Premises Termination User to offtake gas.


Please note, Modification 0854 is subject to Authority Decision which means the decision on approval or rejection is with Ofgem. The timescale for a final decision on Modification 0854 is currently unknown.


Impacted Customer Types

  • NGT


Document title Comment Last updated CHMC outcome
Change Proposal CP raised 10/11/23 Approved at ChMC 08/11/23
Initial Review Stage not required   N/A
DSG Discussion N/A 27.11.23 N/A
High Level Solution Options Stage not required   N/A
Solution Review Stage not required   N/A
Detailed Design 3235.2 - VO - PO 18/12/2023 Approved at ChMC 13/12/23
Evaluation Quotation Reports (EQR) Stage not yet reached   N/A
Business Evaluation Reports (BER) Stage not yet reached   N/A
Change Completion Reports (CCR) Stage not yet reached   N/A


Change Proposal raised
Status To be presented at ChMC 08/11/23
Change development
Status Approved into change development at ChMC
Solution development
Detailed design change pack
Status Consultation closes out on 27/11/2023
Awaiting delivery
ChMC approved into delivery 13/12/23
In delivery
Change implemented

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