Imagine you are a street heroin addict. You have to raise a large sum of money every day for your habit: £100 a day for heroin at that time in the Wirral. How are you going to get it? You can rob. You can prostitute. But there is another way, and it’s a lot less unpleasant than either of them. You can buy your drugs, take what you need, and then cut the rest with talcum powder and sell it to other people.
