See below message on a changeset. User philipcullen has been bulk adding UPRNs to properties in East London (and possibly beyond). He has also added quite a few postcodes in 173286472 <https://www.openstreetmap.org/changeset/173286472>.
I had assumed that there was no valid source for this type of en mass building-by-building postcode import. Is the approach outlined in the changeset comment valid? (If so, yippee!) --- Ken Kilfedder [email protected] ----- Original message ----- From: OpenStreetMap <[email protected]> Subject: [OpenStreetMap] philipcullen has commented on a changeset you are interested in Date: Tuesday, 14 October 2025 20:32 OpenStreetMap <https://www.openstreetmap.org/> *OpenStreetMap* <https://www.openstreetmap.org/> Hi spiregrain, *philipcullen* <https://www.openstreetmap.org/user/philipcullen> left a comment at 2025-10-14 19:32:02 UTC on a changeset you are watching created by philipcullen with comment '*Add UPRNs and address details in London*' philipcullen <https://www.openstreetmap.org/user/philipcullen> Hi, they're sourced from the ONS Open Data and OS Open Data (with additional safety checks, and manual adjustments). The OS data allows a UPRN to be found in areas with well aligned buildings, and the ONS data then provides a postcode for these. Both are licensed under the Open Government Licence (OGL). Reply or learn more about the changeset at https://www.openstreetmap.org/changeset/173286472. You can unsubscribe from updates to this changeset at https://www.openstreetmap.org/changeset/173286472/subscription. OpenStreetMap <https://www.openstreetmap.org/>
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