So the article doesn't really say anything about the victim being involved in activism but I'm 99% sure that this is a part of the UK spycops scandal (if not, holy shit!)
If you want a go in-depth on this case, Tom Fowler has been covering the details as they have been released in his podcast Spycops Info:
https://spycops.info/
He has also appeared on TrueAnon multiple times on episodes of the same name if you want more of a summary than a deep dive:
https://youtu.be/6lYRS-npwPg
https://youtu.be/_gYBA5YfZOs
https://youtu.be/cAp0MFeoroU
(Also available in your podcast app, of course)
Spy Cops was one of many tendrils shot from the black heart of my favourite guy ever Keir Starmer, a man pretty much destined to be the UK's next PM with a huge majority. Fun times for all.
