^"ONS Postcode Directory Version Notes" (ZIP). National Statistics Postcode Products. Office for National Statistics. May 2020. Table 2. Retrieved 19 June 2020. Coordinates from mean of unit postcode points, "Code-Point Open". OS OpenData. Ordnance Survey. February 2012. Retrieved 21 April 2012.
^Royal Mail, Address Management Guide, (2004)
External links
Royal Mail's Postcode Address File
A quick introduction to Royal Mail's Postcode Address File (PAF)