Thank you for that, Mark. As I said, we work very closely with all the local authority leaders in Wales. All of them join the call that I join them on at least once a week, sometimes many more times than that. As I said, we are developing a set of pilots that will explore key aspects of this particular plan: key aspects of manual tracing, scripts, volumes, workforce roles, training requirements, data capture, information flow, potential legal issues, including scenario planning and high-risk contact requirements. So, we are working with our local authorities to understand all the ramifications of that, and to understand what their resource requirements are. And as I said in response to Delyth earlier, we are fully aware that they need to be fully supported in that, and I've made that very clear to the leaders.  

Andrew Morgan, the leader of the WLGA, is absolutely right—it is a mammoth task—but I'm very pleased to say that our local authorities have all stepped up to that plate and are working very hard with us and with the piloting authorities to make sure that we all work together in partnership to deliver this very important plan for Wales.