The Defamation Act of 2013 tightened things up.
I've been sued for defamation lol and threatened with it on a number of occasions so know the law pretty well.
In English law there are a number of defences to defamation:
1) truth
2) honest opinion
3) public interest
4) reportage
5) privilege (complicated to explain, pertains to legal privilege, if you publish something said in court, that isn't true & in other circumstances)
Additionally, if you are suing someone for defamation, you have to prove serious harm, such as losing work, money, or being shunned by your community.
To sue for defamation in the High Court you have to pay court fees which are 5% of the amount claimed for as well as legal fees of your representative. You can't get a McKenzie friend or some unqualified anon to argue for you either. You either argue your own case, or you must appoint a qualified barrister with rights of audience before a judge.
You also must engage in pre action protocol and give the defendant an opportunity to remedy the libel.
TLDR: Styx won't be suing British citizens like Naijella for defamation. It's not worth his time, he'd lose and if he doesn't have the liquidity to stump up bail, he won't be able to pay UK lawyers plus VAT.