Nothing, because .io was operated by some wheeler-dealer without the authority of the UK. Apparently he just dumped money into the bank accounts of the various overseas territories he was selling the domain names for and they were OK with it?
He's since sold it on and now a hedge fund owns it.
https://en.wikipedia.org/wiki/.io
Officially, the British Indian Ocean Territories will cease to exist, therefore so would the ISO 2-letter country code. However, ccTLDs have outlasted countries before, notably ".su" for the no longer existing USSR. I suspect that IANA would prioritise not breaking millions of domain names over trying to police ccTLDs.
Google's view on the matter is that .io is already effectively a gTLD rather than a ccTLD, like with .nu, .to, .tv, as most of the registrants run websites with a global audience or at least an audience other than the island nations whose ccTLDs they are.
He's since sold it on and now a hedge fund owns it.
https://en.wikipedia.org/wiki/.io
Officially, the British Indian Ocean Territories will cease to exist, therefore so would the ISO 2-letter country code. However, ccTLDs have outlasted countries before, notably ".su" for the no longer existing USSR. I suspect that IANA would prioritise not breaking millions of domain names over trying to police ccTLDs.
Google's view on the matter is that .io is already effectively a gTLD rather than a ccTLD, like with .nu, .to, .tv, as most of the registrants run websites with a global audience or at least an audience other than the island nations whose ccTLDs they are.