Protection of Freedoms Bill

I am following the logic of what the Minister says very carefully. He referred to multiple attacks and multiple investigations. Does he accept that multiple attacks in themselves would not justify the use of the power, and that it is the weight of investigation and preparation of cases that would be the trigger? I know that this sounds a little like dancing on the head of a pin, but I hope that he will accept that clarity here is crucial to an understanding of what the Government intend.