One of Putin's main propaganda broadcasters is a UK citizen. A politician has proposed to revoke his UK citizenship.

The UK has been exiling citizens without trial for years now (here's an example), and it an injustice even when the target is the worst of criminals. Situations like this, where a dual citizen is hated for a blatant crime, help normalize undermining human rights for everyone else.

Propaganda in support of an enormous crime should be grounds to prosecute him. It would be legitimate to charge the broadcaster in case he ever comes to the UK again, and freeze his assets now on the strength of those charges.