Two things related to that. First of all, I've had questions from parents asking for justification for the fact that year 9 onwards won't be in school during the lockdown the week after half term. Can you just reiterate the reasons for that and why that's taking place? And associated with it, the advice to schools is to keep classrooms ventilated. A number of parents—and in fact, teachers—have come to me and said that ventilated classrooms are very, very cold. It's a concern that's been raised in Caerphilly, but I've also seen it elsewhere. I've written to Caerphilly council and they say they're providing advice to schools, but is it possible that the Welsh Government also provides advice that ventilation doesn't necessarily also mean freezing classrooms, which is quite important?