I am not responding out of reciprocation. I would like the hon. Gentleman to return to a point he made earlier—he was too quick for me. I am not trying to dramatise the matter, but perhaps somebody should calculate how many people who have committed a murder or a serious crime can bask in the security of the knowledge that there will be no DNA evidence to convict them because it might have been destroyed. I am not trying to accuse the hon. Gentleman of anything; I am sure that he knows I am seeking to make a genuine point. When do we put individual liberty above justice and people's survival?
The second issue is whether there is a median point between everybody or nobody having their DNA recorded. There could well be a large number of people who would voluntarily submit themselves for inclusion, and if there were a media campaign for people to do that, it would put enormous pressure on others. The hon. Gentleman suggested that there was a stark choice between one side of the argument or the other, but I feel that there are some shades of difference between those points of view.