ISO 3166-2:GB is the entry for the United Kingdom of Great Britain and Northern Ireland (GBNI) 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 divisions and subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1.[1] The codes and structures for the United Kingdom (UK) are provided to the ISO in Geneva by the British Standards (BS) and the Office for National Statistics (ONS).