The OS Open UPRN is a annoyingly gimped dataset, but it's actually turned out to be incredibly helpful helpful at spotting errors in #OSM. Plus it might be our back door into AdressBase 🤫
AddressBase have a very hostile copyright structure, and a massive pay to play barrier. But #OSM could create a alternative for the people, by the people. It's not going to happen anytime soon, but it's inevitable.