This is the User Guide for the National Statistics UPRN Lookup (NSUL) for Great Britain as at October 2017. The NSUL relates the Unique Property Reference Number (UPRN) for each GB address to a range of current geographies via 'best-fit' allocation from 2011 output areas. (File Size - 211 KB)

This file contains the ONS UPRN Directory (ONSUD) for Great Britain as at November 2019. The ONSUD relates the Unique Property Reference Number (UPRN) for each GB address from AddressBase® Epoch 71 to a range of current statutory administrative, electoral, health and other statistical geographies. The ONSUD is produced by ONS Geography, who provide geographic support to the Office for National Statistics (ONS) and geographic services used by other organisations. The ONSUD is issued every 6 weeks and is designed to complement the Ordnance Survey AddressBase® product. For further technical information about this file, please refer to the User Guide document contained within the downloadable zip file. Please note that this product contains Royal Mail, Gridlink, Ordnance Survey and ONS Intellectual Property Rights. (File Size - 460 MB)