Erm, since when ?
ISO3166 quite clearly says: UNITED KINGDOM GB and UKRAINE UA
UK is "exceptionally reserved" on request of the United Kingdom, but it is not the official abbreviation, which is GB.
See the https://www.iso.org/iso-3166-country-codes.html and follow the link to "Online Browsing Platform".
https://www.loc.gov/standards/iso639-2/php/langcodes_name.ph...
Erm, since when ?
ISO3166 quite clearly says: UNITED KINGDOM GB and UKRAINE UA
UK is "exceptionally reserved" on request of the United Kingdom, but it is not the official abbreviation, which is GB.
See the https://www.iso.org/iso-3166-country-codes.html and follow the link to "Online Browsing Platform".