>You kinda hint at the answer in your post already - you keep referring to "the government", but who? Is there one or a few people responsible for directing others to perform the unlawful surveillance?
Yes. Those that signed related orders. It doesn't even matter if they get them all, just some high enough would be enough to deter others.
The Human Rigths Act specifically does not grant the courts the possibility of not following Acts of Parliament when the too conflict. The courts can only give an declaration of incombability which they have done. This is how an Parliamentary sovereignty works.
Yes. Those that signed related orders. It doesn't even matter if they get them all, just some high enough would be enough to deter others.