Yes, which is why I highlighted it in my press conference yesterday. I made specific mention of the research that scientists at Bangor University are leading on. And whilst we don't necessarily like to think about what happens with our sewerage every day of the week, it is a really interesting and useful way to find out—and potentially at a much earlier stage, as you mention—what is happening within each local community, within each local system, both to give an early warning of where coronavirus is on the rise, but also to give us a better idea, crucially as well, of if there's been a sustained fall-off as well. So, you wouldn’t normally get excited about testing sewerage, but this is a really crucial area of research for us, and if we're able to understand it at scale, then it can be really useful, not just in Wales, but across the UK, and I'm very proud of the work that Bangor scientists are doing with Welsh Water and the United Utilities.