Talia Lattimore

Please be advised that CSL (CNG Services Limited) have today raised the following Independent Network Code (INC) Modification:

• CSL01 – Exclusion of Standalone Networks from IGT UNC

 Summary of Modification

The IGT UNC rules do not work well for networks with no connection to the GB gas grid. CSL have raised this proposal to update their INC to exclude them from the IGT UNC.

Next Steps

The Panel will consider this Modification at its meeting on 23rd January 2026.

Further Information

Further information, including the Proposal Form, can be found on the CSL01 page of the IGT UNC website.

If any parties have any questions about this Modification, please do not hesitate to reach out to the Code Administrator.

Please be advised that BUUK have raised a new IGT UNC Modification today (24th July 2025):

• IGT178 – PC4 Read Submission Window Extension

Summary of Modification

This Modification seeks to align the IGT UNC with the UNC following the implementation of UNC0884: Extending the PC4 Read Submission Window. The reference within the IGT UNC to the number of Supply Point Systems Business Days (SPSBD) after the read date to submit a read for settlement needs to be updated to remain aligned.

Further Information

Further information, including the Proposal Form and Draft Legal Text, can be found on the IGT178 page of the IGT UNC website.

If any parties have any questions about this Modification, please do not hesitate to reach out to the Code Administrator.

Please be advised that BUUK have raised a new IGT UNC Modification today (21st May 2025):

• IGT177 – Aligning IGT “must read” obligations within the IGT UNC

Summary of Modification

This Modification seeks to maintain existing obligation on IGTs to obtain a meter reading (commonly called the “must read” obligation) following non-provision of a Valid Meter Reading by a Shipper, by removing reference to UNC TPD M 5.10 from IGT UNC Part E – Meter Reading, 11 (Failure to obtain readings), and aligning the total relevant text within the IGT UNC.

Further Information

Further information, including the Proposal Form and draft legal text changes can be found on the IGT177 page of the IGT UNC website.

If any parties have any questions about this Modification, please do not hesitate to reach out to the Code Administrator.

Please be advised that CNG Services Ltd have raised a new IGT UNC Modification today (19th March 2025):

• IGT176 – Changes to IGT UNC to enable UNC0887 ‘Facilitating Bi-Directional Connections Between IGT Pipelines and the NTS’

Summary of Modification

This Modification identifies the requirement for and aims to make changes to IGT UNC to enable UNC0887 ‘Facilitating Bi-Directional Connections Between IGT Pipelines and the National Transmission System (NTS)’ ‘to be implemented by including its operator, National Gas Transmission (NGT) as a ‘Large Transporter’ and to apply the core IGT concept of ‘deeming flow’ to and from the National Balancing Point (NBP), whilst replicating as closely as practicable the existing NTS ‘direct connect’ exit and entry arrangements that UNC Shippers use.

Further Information

Further information, including the Proposal Form, can be found on the IGT176 page of the IGT UNC website.

If any parties have any questions about this Modification, please do not hesitate to reach out to the Code Administrator.