I intervene simply because the command structure does not really come into it. The decision is in the yellow card. Individuals have to make their own decisions about opening fire; there is no time to turn around and ask for permission. The decision can sometimes be made very quickly. I take the hon. Gentleman’s point about the command structure being involved, but opening fire is a personal decision and the person who makes it has to stand by it and justify it. That is why it is so important to train very hard on the yellow card.