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XRN 5080
Failure to Supply Gas (FSG/GSOP1) – System Changes

This XRN is part of XRN 5294 Minor Release Drop 9
Last Updated
06 Apr 2021
Release Type
Implementation Date
20 Mar 2021
Proposer Scotland and Southern Gas Networks SGN Impacted DSC service area

Service Area 7 (Previous Dec 18 – Mar 21)

NTS Capacity / LDZ Capacity / Commodity / Reconciliation / Ad-Hoc Adjustment and Energy Balancing Invoices

Customer Change Team Leader


This change requires various amendments to the current FSG/GSOP1 service provided by Xoserve.

   - Scheduled payment frequency from fortnightly to weekly.

This would accommodate the reduction from 20 to 10 working days for settlement after an FSG event.

The adhoc FSG process should endure in the event of a major incident.

   - UK Link SAP ISU parameter change.

The current Ofgem level of compensation (£1,000) will no longer be required as the ceiling on payments will be lifted with no upper compensation level required.

   - Removal of the maximum number of days payable to a customer who has been off gas, this will now be unlimited.

   - All GSOP (1, 2, 3,12 & 13) rates of compensation are to be amended yet to be advised by Ofgem.

These changes will require amendments to the validation rules applicable to GSOP1 and the subsequent payment of GSOP12 in the event of a failure to make payments within the 10 working days window.

Consideration any changes within the process required to address iGT customer payments i.e. timescales constrictions, payment recipient iGT or Customer and GSOP 12.

This Change is in scope of Minor Release Drop 9.

Impacted Customer Types

  • IGT
  • Shipper
  • DNO


Document title Last updated Type
XRN5080 CP 16/Nov/2020 PDF


Initial Review
Start: 00/00/00
Status Awaiting
Expected: 00/00/00
Status Awaiting
Solution Consultation
Solution Review consultation in October Change Pack - For Approval at ChMC 11th November 2020 11/11/20
Status Awaiting
Awaiting Delivery
Expected: 00/00/00
Status Awaiting
In Delivery
Minor Release 9 Design Change Pack issued 18/01/21
Status ChMC approved design 11/02/2021
Expected: 20/03/21
Status Change Implemented 20th March 2021 and became effective 1st April 2021

Contact the Change Team

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