Presumably the only things he can be prosecuted for are breaches of GDPR, but if everything he publishes is already in the public domain, it is legal.

I still can't understand why he hasn't been pulled up for it properly yet.

He was dragged into court and forced to remove it last time and I believe was told not to do it again under threat of a 'proper' punishment. He then stated how he'd do it again almost as soon as he walked out the doors of the court.

Oh, for a second i thought it was going to refer to that other upstanding citizen Christopher Whitwer of Exeter, or HMP, wherever he runs his sordid little operation from these days...

https://www.dailymail.co.uk/news/article-12128395/Two-paedophile-hunters-wrongly-accused-father-sexting-child-branded-rapist.html#comments

A good news story, of sorts. Most of the comments were hostile to the vigilantes as well, which I take to be a positive sign.

"Miller has previous convictions for impersonating a police officer, violent disorder and witness intimidation."
So this 'up standing citizen', is just as much of  a 'wrong un' as the people he is trying to catch. Total hypocrite.