Last updated:
28 January, 2026
Current version
1.0
Proposer
National Gas Transmission
Impacted codes
UNC
Status:
Implemented
Impact:
High impact: National Gas Transmission
Purpose of Derogation Application (Specify associated Use Case):
This UNC Derogation request will remove potential UNC constraints for the successful trial of new technologies or other technological advances, and Special Condition 1.1(d) ‘a change in the pace or nature of the uptake of low carbon technologies’, aligning with the UNC Derogation relevant Use Case (Net Zero).
Successful implementation of the associated trial took place in October 2025: https://www.nationalgas.com/media/news/trials-transformation-how-blending-hydrogen-will-unlock-britains-hydrogen-economy
Timeline
Panel Assessment
Yes
19/12/2024
Workgroup Report Due
Unset
19/06/2025
Consultation
Completed
20/12/2024
31/01/2025
Consultation - Final Modification Report
Yes
03/02/2025
Panel Decision
Yes
20/02/2025
Status
Sent to Ofgem 21/02/2025
Authority Decision
26/09/2025
Implementation
Completed