I completely agree with my hon. Friend. Having met far too many victims of knife crime myself, I know she is absolutely right. It behoves us all—we all have a duty—to think carefully about what more we can do to address this terrible phenomenon. I do not understand what possesses somebody to take a knife out at night, not least because we know that if someone carries a knife they are actually more likely to be stabbed, not less, even if they are carrying it for self-defence. What we need to get to is a situation where people know that our public space is well guarded and is a lawful public space, and therefore feel safe enough that they do not have to carry a knife, even for self-defence.