Thank you. I don't underestimate the task for secondary school heads, in particular, of reconfiguring school layouts, timetables and attendance times in order to comply with the rules on social distancing and hygiene. But I don't think there can be any justification for hundreds of pupils being sent home to self-isolate just because one individual has tested positive. Five hundred and fifty three children were sent home from just two schools in Cardiff a week ago, and both of these where there was just one case. I don't think that's proportionate. Why are heads still in the position where they feel that they have no choice but to send so many pupils home? And do they need the protection of the law to give them the confidence to isolate smaller numbers?