Well, Llywydd, we backdate to 23 October, because that is when the firebreak period was introduced in Wales, and that gives us a reason for doing that. The purpose of the £500 is to assist people to self-isolate. It's no assistance to people to do that if the period of self-isolation has already been completed many, many weeks ago. The practical challenges are in designing a system that is not open to fraud, because we cannot have a system in which people simply self-declare that they have been asked to self-isolate and then claim £500 of public money. We need to be certain that if people get the £500, as we want them to do, because we want people to be able to self-isolate, then we need to know that those people have been asked to do so by our test, trace, protect system and, therefore, are bona fide claimants of this public money.