National Statistics UPRN Lookup (October 2025) (Epoch 121) User Guide V2

This User Guide contains information about the NSUL including: directory content; data currency; the methodology for assigning areas to postcodes; data formats; data quality and limitations and details of recent changes that have impacted on the data. Various annexes and tables provide more detailed supporting information. The download includes PDF and ODT versions of the user guide. (File size - 369 KB) [11/06/2026: V2 published to reflect corrected V2 of the NSUL file]本用户指南涵盖NSUL的相关信息，具体包括：目录内容、数据时效性、邮编区域分配方法、数据格式、数据质量与局限性，以及影响该数据的近期变更详情。各类附件与表格可提供更为详尽的辅助支撑信息。本次下载包包含该用户指南的PDF及ODT格式版本，文件大小为369 KB。[2026年6月11日：发布V2版本，以匹配已修正的NSUL文件V2版]