The Home Secretary is a proxy for the security services. Not the police, I'm referring to MI5. It doesn't seem to matter who holds the job, they've been pushing this for decades.
MI5 have no interest in things like warrants or courts and a rather murky history in Northern Ireland.
I think GP's point is the warrant isn't needed. I guess whether it is relevant to your comment depends on whether your point is that a warrant is required despite their authority, or that you are simply pointing out that those in authority have a default duty/right to an individual's private conversations.
MI5 have no interest in things like warrants or courts and a rather murky history in Northern Ireland.