Thanks very much, Sarah. I'm pleased to say that we have tried, throughout this pandemic, to take that evidence-based approach, which was why we were slightly blindsided by the UK Government making an announcement that they clearly hadn't discussed with almost anyone in terms of stopping self-isolation. So, it is a shame that we get to that situation, and it's pretty obvious that it's a distraction technique from the very difficult situation that Johnson finds himself in at the moment politically.

Just in terms of the timetable for five to 11-year-olds, we're obviously waiting for that formal advice to come from the JCVI. I'm not quite sure what's holding it up. We know that it's available, and it's important that we are able to forge ahead with our plans. Obviously, we thought that this might be coming our way, so a huge amount of preparation work has already been undertaken, but we can't really press the button finally on it until we have that final JCVI publication that we're hoping to see imminently.