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XRN 5529
UNC Derogation process – MOD 0800

Last Updated
05 Jan 2023
Release Type
Implementation Date
01 Oct 2022
Proposer Northern Gas Networks Impacted DSC service area


Not applicable

Customer Change Team Leader


This Change proposal was raised to support UNC Modification 0800, which seeks to introduce the concept of derogation of UNC code and the governance process as which this is submitted, assured and approved/rejected.

The CDSP would need a process set up in which to receive, process and handle these derogation requests.

Impacted Customer Types

  • GT
  • IGT
  • NGT
  • Shipper
  • DNO


Document title Comment Last updated CHMC outcome
Change Proposal Change Proposal raised 15/07/2022 Approved at ChMC 13/07/2022
Initial Review N/A N/A N/A
DSG Discussion N/A 25/07/2022 N/A
High Level Solution Options N/A N/A N/A
Solution Review N/A N/A N/A
Detailed Design N/A N/A N/A
Evaluation Quotation Reports (EQR) N/A N/A N/A
Business Evaluation Reports (BER) N/A N/A N/A
Change Completion Reports (CCR) CCR approval 05/01/2023 Approved at ChMC 07/12/2022


Initial Review
Change Proposal Rasied 29/06/22
Status Awaiting approval at ChMC 13/07/2022
Approved into Capture 13/07/22
Status ChMC approved into Capture
Solution Consultation
Expected: 00/00/00
Status Awaiting
Awaiting Delivery
Expected: 00/00/00
Status Awaiting
In Delivery
Expected: 00/00/00
Status Awaiting
Delivered under Adhoc release 01/10/22
Status Implemented alongside Modification 0800 implementation on 01/10/2022

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