National Statistics UPRN Lookup (December 2025) (Epoch 123) User Guide

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 - 422 KB)本用户指南涵盖NSUL（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，以及近期对该数据产生影响的变更详情。本指南附带多份附件与表格，可提供更为详尽的辅助信息。本次下载包包含该用户指南的PDF及ODT版本，文件大小为422 KB。