National Address Gazetteer

The National Address Gazetteer is a database designed to provide a definitive source of publicly owned spatial address data for Great Britain. It is a culmination of Local Land and Property Gazetteers (collectively known as the National Land and Property Gazetteer (NLPG)) and other datasets: Address Layer 2 (AL2) and Royal Mail PAF data.

Source: Wikipedia — National Address Gazetteer (CC BY-SA 4.0)