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XRN 4992
Modification 0797 (Urgent) - Last Resort Supply Payments Volumetric Charges

Last Updated
28 Mar 2023
Release Type
Implementation Date
25 Feb 2023
Proposer Total Gas and Power Impacted DSC service area

Service Area 1 (Current Apr 21)

Manage Shipper Transfers

Customer Change Team Leader


This Proposal creates a new charge type to be used to recover LRSPs from Supplier of Last Resorts (SoLR). It is based on a volumetric unit rate to ensure that smaller users of gas pay a smaller proportion of the overall recovery. The allocation to specific sectors where the costs originated from provides a fair apportionment.


A new specific charge type (SoLR Customer Charge) will be created and added to the current Distribution Network Transportation Charging Methodology. Cost recovery will be targeted to market sector to align to the sector where the costs arose from. A volumetric approach will then ensure that within each market sector, smaller users of gas pay a lesser charge than larger users.


XRN4992a - Interim Solution - This Change was scoped into November 2021 Major Release and the solution is due to be implemented April 2022. 

Impacted Customer Types

  • Shipper
  • DNO


Document title Comment Last updated CHMC outcome
Change Proposal Change Proposal Raised 01/08/2019 Approved at ChMC on 07/08/2019
Initial Review Stage not used N/A N/A
DSG Discussions  N/A 06/06/2022 N/A
High Level Solution Options (4992a)  HLSO for 4992a 12/01/2022 Option 4 approved
Solution Review Re-issue 28/02/2022 Solution approved ChMC on 12/01/2022
Detailed Design Approved 10/06/2022 Detailed Design for 4992b was approved at ChMC on 08/06/2022
Evaluation Quotation Reports (EQR) N/A N/A N/A
Business Evaluation Reports (BER) N/A 28/03/2023 Approved at ChMC on 29/07/22
XRN 4992 e-learning Online e-learning session 09/02/2023 N/A
Change Completion Reports (CCR) N/A N/A N/A


Initial Review
Start: 00/00/00
Status Awaiting
Expected: 00/00/00
Status Awaiting
Solution Consultation
Expected: 00/00/00
Status Awaiting
Awaiting Delivery
Expected: 00/00/00
Status Awaiting
In Delivery
Awaiting Detailed Design approval at ChMC 08/12/21
Status ChMC approved Design 08/12/2021
Expected: 25/02/23
Status Successfully Implemented

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