https://www.bbc.co.uk/news/technology-65388255
Bit of a turn up for the books. Turns out, particularly if an amendment passes in the House of Lords, Wikipedia could fall foul of the age verification bill. Turns out it isn't just pornographic websites that will have to implement it. This could affect any website, including Twitter, that allows linking or hosting of NSFW content. Never mind the threat of all the instant messaging apps to block the UK when the law is implemented. Even this website will have to either age verify or block UK residents. And we still have the prospect of residential VPNs being regulated to the point of being pointless and effectively banned.
Unlike the similar EU Digital Services Act, there will be no exception for encyclopedic and educational content.
I can imagine a few people will not shed a tear if Wikipedia is blocked in the UK.
If this website doesn't have employees or financial accounts in the UK, and if no treaties bind the country or countries in which there are employees or financial apparati, then we don't have to block the UK, only tell them to pound sand and wait for them to block us.
Wikimedia has a UK arm, so yes. Even then, GDPR requirements resulted in websites outside of Europe with no presence in Europe blocking European visitors, not the other way round.