I congratulate my hon. Friend. He is making an extremely good argument so far, except that it does not address the wider benefit that comes from a change in the law here, which is about the knowledge that you have that control available to you as you enter a period when you might be contemplating these very difficult decisions. That is the principal benefit that would come from a change in the law. By leaving a grey area in the law, we deny nearly all of us the benefit of knowing that we have that control at the end of our life.