Senator Henry's proposal if implemented would not establish a precedent. When I became a Member of this House ten years ago I recall being involved in a debate involving the prison service, and asking myself what the purpose of a prison was. One of the answers I came up with was to protect society, another was to act as a deterrent and certainly as a form of punishment. Another answer was rehabilitation. We were talking about normal prisons for normal criminals – but what happens when we come to the mentally ill? That is surely a much bigger challenge, one we must face up to.