That doesn’t make any sense. It’s not wikimedia’s responsibility to ensure people from the UK don’t hit their servers by typing wikipedia.org into the browser bar.
"Ofcom is the independent regulator for Online Safety. [...] Ofcom has strong enforcement powers"
https://www.gov.uk/government/collections/online-safety-act
Okay, so what does Ofcom say?
"It doesn’t matter where you or your business is based. The new rules will apply to you (or your business) if the service you provide has a significant number of users in the UK, or if the UK is a target market."
https://www.ofcom.org.uk/online-safety/illegal-and-harmful-c...