A Cornerstone for Open Data: The Postcode Address File Link 25 Apr 2013 Our Thinking Nigel Shadbolt, PAF, Postal Address File, Royal Mail Nigel Shadbolt’s blog for the Open Data Institute on the Royal Mail’s stewardship of the Postcode Address File (PAF), a database of addresses and postcodes of 28 million UK households. → http://www.theodi.org/blog/cornerstone-open-data-postcode-address-file