Code Release

Please be advised that a pre-Release version of the IGT UNC is now available ahead of the November 2026 Scheduled Release. This release will go live with effect from 05:00 on Friday 6th November 2026.

A clean and tracked version of v13.30 of the IGT UNC is now available here. Pre-Release versions of any impacted Ancillary Document can be found here.

Modifications included in this Release

This Release will incorporate changes to the IGT UNC to implement the following Modification:

• IGT184 – RG008 Housekeeping: Parts CI-CV, L, O, and IGT UNC Derogations Guidance

This Release also incorporates changes to the following ancillary document to deliver changes approved for IGT184:

• IGT UNC Derogations Guidance Document

If any Parties have any comments with regards to this Release, please contact the Code Administrator (IGTUNC@talan.com).

We are pleased to confirm that version 13.29 of the IGT UNC went live with effect from 05:00 on 14th August 2026.

A copy of v13.29 (clean and tracked) can be found on the IGT UNC website, here.

Changes included in this Release

This Release incorporated changes to the IGT UNC for the following approved Modification:

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

This Release also incorporated Phase 2 changes for the following approved Modification:

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

Phase 1 changes for IGT181 went live on 23rd July 2026.

If any Parties have any comments with regards to this Code Release, please contact the Code Administrator.

We are pleased inform you that the Extraordinary July 2026 Release is now live, and v13.28 of the IGT UNC has been published today. A change marked and clean version of this Code Release have been uploaded to the IGT UNC website, here.

Modifications included in this Release

This Extraordinary Release went live with effect from 05:00 today and incorporated changes to implement the following Modifications:

• IGT182 – Alignment of the IGT UNC with the UNC definition of the Data Permissions Matrix 
• IGT181 – Revision of Virtual Last Resort User and Contingent Procurement of Supplier Demand Event Triggers
• • Please note that this Modification has a Phased Implementation approach. Phase 1 changes were implemented today as part of this Extraordinary Release. Phase 2 changes will be implemented on the same day as Modification IGT176 (currently expected in August 2026).

If any Parties have any comments with regards to this Extraordinary Release, please contact the Code Administrator.

Please be advised that Version 13.26 of the IGT UNC went live with effect from 05:00 on Friday 29th May 2026.

The updated Code can be found on the IGT UNC website, here.

Changes included in this Release

This Release incorporated the Ofgem designated changes for the implementation of the prioritisation process as set out under Code Reform.

If any Parties have any comments with regards to this Code Release, please contact the Code Administrator.