Open Modification

Please be advised that Centrica has today raised the following IGT UNC Modification:

• IGT183 – Maintenance criteria for Emergency Contact data held in Central Systems

Summary of Modification

IGT UNC Part I 1.15 a) outlines that the Central Data Services Provider (CDSP) has an Agency Function to maintain a record of User emergency contact details. This Modification has been raised to outline the parameters in which the emergency contact details are maintained under Part I 1.15 a) and under what circumstances emergency contact details provided for Larger Supply Points below the Annual Quantity (AQ) threshold (see IGT UNC Part I 8.0 and 9.0) should be recorded and retained.

Next Steps

The Panel will consider this Modification, which is proposed to be a Self-Governance Modification, at its meeting on 29th May 2026.

Further Information

Further information, including the Proposal Form, can be found on the IGT183 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 CSL has today raised the following IGT UNC Modification:

• IGT182 – Alignment of the IGT UNC with the UNC definition of the Data Permissions Matrix

Summary of Modification

The purpose of this Fast Track Self-Governance Modification Proposal is to align the existing IGT UNC definition with the UNC definition of the Data Permissions Matrix as proposed by UNC 0921S – Broadening the definition of the Data Permissions Matrix to align with disclosure of UK Link Gemini data.

Next Steps

The Panel will consider this Modification, which is proposed to be a Fast Track Self-Governance Modification, at its meeting on 26th June 2026.

Any party objections to this Fast Track Self-Governance Modification Proposal should be submitted to the IGT UNC Code Administrator (IGTUNC@talan.com).

Further Information

Further information, including the Proposal Form, can be found on the IGT182 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 ES Pipelines Limited has today raised the following IGT UNC Modification:

• IGT181 – Revision of Virtual Last Resort User and Contingent Procurement of Supplier Demand Event Triggers

Summary of Modification

This Modification seeks to align the IGT UNC with the changes implemented into the Uniform Network Code (UNC) under UNC0854 ‘Revision of Virtual Last Resort User and Contingent Procurement of Supplier Demand Event Triggers’ in May 2024. This will ensure that the UNC processes can apply to IGT Supply Meter Points (SMPs) as intended under UNC0854.

Next Steps

The Panel will consider this Modification at its meeting on 27^th February 2026.

Further Information

Further information, including the Proposal Form, can be found on the IGT181 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 has today raised the following IGT UNC Modification:

• IGT180 – CDSP Obligations required for the introduction of the Gas Shipper Obligation

Summary of Modification

The Gas Shipper Obligation (GSO) is intended to be the long-term funding mechanism for initial hydrogen production projects funded through the Hydrogen Production Business Model (HPBM).

The GSO charge will be placed on Shippers based on the quantity of gas they ship to customers.  The GSO scheme will be administered by the GSO Administrator (who is expected to be the Low Carbon Contracts Company (LCCC), subject to formal appointment through regulations) and will be outside of the IGT UNC (as well as the UNC).  This Modification will create obligations on the Central Data Service Provider (CDSP) to provide services to the GSO Administrator to support the implementation of the GSO scheme, including a period of live data testing.  It is proposed that a subsequent Modification to this one is developed and implemented to ensure the CDSP Obligations endure following implementation of the GSO legislation.

 Next Steps

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

Please be advised that this Modification is being progressed jointly with related UNC Modification 0922 – CDSP Obligations required for the introduction of the Gas Shipper Obligation. The Joint Office will be administering the joint IGT UNC and UNC Workgroup meetings. The first three meetings have been scheduled as follows:

Thursday 12th February 2026: from 9.30am to 11.30am

Thursday 12th February 2026: from 9.30am to 11.30am

Thursday 23rd February 2026: from 9.30am to 11.30am

Any IGT UNC Parties wishing to attend these meetings can provide attendee names and email addresses to the IGT UNC Code Administrator (IGTUNC@talan.com), who will pass the details onto the Joint Office. Alternatively, parties can also contact the Joint Office directly (enquiries@gasgovernance.co.uk) to provide this information.

Further Information

Further information, including the Proposal Form, can be found on the IGT180 page of the IGT UNC website.

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

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.