The solutions we pursue have to be shown to work. In the end, we need solutions that will work, because these people are often locked up for considerable periods of time, and when they come back out they still offend again. For some of those individuals, the problems will relate partly to addiction issues. It is important that we trial and use methods that help people to cut their addiction and usage in order to stop them committing crimes fuelled by that addiction. As I say, that will need a multi-layered response. I am determined that we will crack down on the scourge of prolific offenders; that is the only strategy for cutting crime, and we are determined to pursue it. We want to have measures that work, which is why I asked the sentencing review to consider them specifically.