My Lords, the noble and learned Lord makes a good point. The precise definition has not yet been settled upon. The provision seeks to address the mischief where individuals have been identified and they have been known to have instigated an act of terrorism or to have been planning, preparing or conspiring to commit an act of terrorism. The provision is to enable us to intervene at that preparatory stage and not have to wait until they do something more that demonstrates further intent in relation to dates.
If, for instance, one went out and purchased certain goods that one had ready, with other information, that may be sufficient for an act preparatory. We are trying to think about that mischief and then try to cast the net tight enough to restrict it to those who are engaged in that way. I absolutely bear in mind what the noble and learned Lord said.