Toss a few of them in prison for a bit, and see whether that improves cooperation.
We have a similar problem in the U.S.; in corporations, effectively no one ends up being personally responsible.
However, if an individual personally fails to implement a judicial ruling, that anonymization and "monefication" of penalty may dissolve.
I'm of very mixed opinion and feeling about several laws that may be involved -- both aspects of IP law and aspects of UK libel law.
But I also rather dislike unbridled corporate arrogance.