https://geoportal.statistics.gov.uk/datasets/ons-uprn-directory-may-2025-epoch-118-user-guide
ONS UPRN Directory (May 2025) (Epoch 118) User Guide
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https://geoportal.statistics.gov.uk/datasets/ons-uprn-directory-july-2018-1
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https://geoportal.statistics.gov.uk/datasets/ons-uprn-directory-november-2025-epoch-122-user-guide
ONS UPRN Directory (November 2025) (Epoch 122) User Guide
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