If GP is not a UK citizen and does not live in the UK, how would that be unlawful? They're not beholden to or subject to UK law. The UK's belief that they can

If GP is not a UK citizen and does not live in the UK, how would that be unlawful? They're not beholden to or subject to UK law. The UK's belief that they can enforce this law on non-UK entities is ridiculous.