Current Status: Implemented
IGT178 was implemented on 27th February 2026, as part of the February 2026 IGT UNC Release, in line with UNC0884 and XRN 5906.
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.
Progression Timetable
| Initial consideration by Panel | 29/08/2025 |
| Initial consideration by Workgroup | 11/09/2025 |
| Workgroup Report presented to Panel | 26/09/2025 |
| Draft Modification Report issued for consultation | 29/09/2025 |
| Consultation close-out date | 20/10/2025 |
| Final Modification Report available for Panel | 24/10/2025 |
| Modification Panel Decision | 31/10/2025 |
| Implementation Date | 27/02/2026 |
Documentation
| Document | Description | Document Type | Author | Date |
| IGT178 | Notice of Implementation v1.0 | Adobe PDF | Code Administrator | 03/11/2025 |
| IGT178 | Final Modification Report v1.0 | Adobe PDF | Code Administrator | 03/11/2025 |
| IGT178 | Final Legal Text (v1.0) | Adobe PDF | BUUK | 03/11/2025 |
| IGT178 | Final Modification Report v0.1 | Adobe PDF | Code Administrator | 23/10/2025 |
| IGT178 | Centrica Consultation Response | Adobe PDF | Centrica | 20/10/2025 |
| IGT178 | Indigo Consultation Response | Adobe PDF | Indigo | 20/10/2025 |
| IGT178 | NESO Consultation Response | Adobe PDF | NESO | 20/10/2025 |
| IGT178 | BUUK Consultation Response | Adobe PDF | BUUK | 20/10/2025 |
| IGT178 | Draft Modification Report (v1.0) | Adobe PDF | Code Administrator | 29/09/2025 |
| IGT178 | Draft Legal Text v0.1 | Adobe PDF | BUUK | 24/07/2025 |
| IGT178 | Draft Modification Report (v0.1) | Adobe PDF | Code Administrator | 18/09/2025 |
| IGT178 | Workgroup Report (v1.0) | Adobe PDF | Code Administrator | 18/09/2025 |
| IGT178 | Draft Workgroup Report (v0.1) | Adobe PDF | Code Administrator | 04/09/2025 |
| IGT178 | Modification Proposal Form (v2.0, Code Administrator email updated) | Adobe PDF | BUUK | 04/08/2025 |
| IGT178 | Modification Proposal Form (v1.0) | Adobe PDF | BUUK | 24/07/2025 |
| IGT178 | Draft Legal Text v0.1 | Adobe PDF | BUUK | 24/07/2025 |