UNC0884: Uniform Network Code (UNC) changes

UNC0884: Uniform Network Code (UNC) changes | Ofgem Please enable JavaScript in your web browser to get the best experience. BETA This site is currently in BETA. Help us improve by giving us your feedback . Close alert: UNC0884: Uniform Network Code (UNC) changes Publication type: Code modification Publication date: 24 October 2025 Topic: Metering, Energy codes Subtopic: Uniform network code (UNC) Print this page Share the page Share on Facebook Share on Twitter Share on LinkedIn Outcome of changes to Uniform Network Code UNC0884, extending the read submission window for PC4 meter reads to improve settlement accuracy. Details of outcome Ofgem has directed that UNC Modification 0884 be implemented. The change extends the read submission window for Profile Class 4 (PC4) sites, allowing more valid meter reads to enter settlement. This is expected to reduce Unidentified Gas (UIG), improve Annual Quantity (AQ) accuracy, and reduce the need for manual AQ fixes and repeat site visits. Start date To be confirmed by the Code Administrator. Code modification description UNC Modification 0884 was raised by Ovo Gas Ltd on 11 June 2024. It seeks to extend the read submission window for PC4 meter reads beyond the current 25 Supply Point System Business Days (SPSBDs). The change introduces staggered benchmarks for both domestic and non-domestic premises to ensure timely data flow while allowing flexibility for complex reads. The modification was proposed in response to industry feedback and analysis showing that many valid reads are excluded from settlement due to timing constraints. Main document Uniform Network Code (UNC) 0844: Extending the PC4 Read Submission Window [PDF, 211.59KB] Print this page Share the page Share on Facebook Share on Twitter Share on LinkedIn Close