This isn't the problem you're looking for
Al-Qaeda learned pretty quickly how to get off the grid and in the end Bin Laden was only caught when the relevant people in the Pakistani military decided to stop hiding him. And Four Lions highlighted how quickly current "best practices" filter down to even the biggest idiots.
Blanket surveillance of the population is at best a money pit and at worst an accident waiting to happen: all that data will have value to someone whether they're in the government or not.
But I have a feeling that, since the deal with the DUP, the security forces may soon find that they're facing a very different and better organised threat.
I'm off to put on my scrambler suit…