I think it is wise and, indeed, necessary to stick with that narrow definition that the police chiefs have been presenting to you. I think it needs to be very clear if this comes to be interpreted by the courts that it is that narrow approach; it is not broader metadata that gives patterns.
To me, it's all about individual events that start a criminal investigation. It's not about broad intelligence about somebody's overall use. So I think that's a crucial limit and I'll defer to the experts, including the police who've been briefed by their IT people. If that's the definition they endorse, that's the one you need to have, from my perspective.