Psychoactive Substances Bill [HL]

I am grateful to the noble Lord for giving way. I would like to understand—maybe if I had heard some of the other amendments I would have understood, but I am not sure I would have done given the comments that have been made—how, if the police, for example, have seized a product which may or may not be a psychoactive substance, they assess whether it is going to have these effects on somebody’s brain. Do they feed it to a tame police officer, or to a young person whose brain may be less developed? How is this going to happen? Is that something that then has to be replicated in a court room? What is the process going to be for saying, “This is definitely a psychoactive substance”? How will they tell?