High Quality Content by WIKIPEDIA articles! ISO 3166-2:GB is the entry for the United Kingdom in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1. The codes and structures used are provided to the ISO by British Standards and the Office of National Statistics.