I came across someone I know who is a teacher and who 'definitely' had Covid just after lockdown and 'definitely' got it at school. The fact that she takes two buses each way and was in the habit of regularly dropping into a local cafe to get some marking done before going home was irrelevant - only possibility is that she got the virus at school. She also goes, or rather went, to church and to a couple of exercise classes, but it can't have come from them, either.
No warnings of preparations for a second wave from my two doctor neighbours.
I hope it goes smoothly for the school-returners tomorrow. In fact, I hope it goes so smoothly that the schools are encouraged to bring in more children.