Feeling much more relieved after speaking to School Nurse at DD's school. For context, DD12 has had a cold since last Wednesday and Friday evening she developed a cough. Initially it was infrequent, it got slightly more frequent over the weekend and she began to get a little wheezy with it. This is not unusual for her, she has an inhaler precisely because coughs/colds always go to her chest. She has had her reliever inhaler once today and it has helped. She is well in herself but she is still blocked up and periodically coughs to clear her throat of mucus. These are mostly voluntary rather than involuntary coughs - i.e. she coughs to clear her throat, not because she can't help it. If she laughs or talks a lot, sometimes this triggers a one-off cough that is involuntary. (She's been laughing a lot, hence she clearly feels fine!)
I kept her off today as I was unsure what to do and asked if the School Nurse could phone me. Her advice was that their protocol is to ask the parent to call 119 for advice. If they advise that the child does not have to isolate, send them to school; if they advise isolating and testing then the parent should do that. However, this doesn't preclude the child being sent home if teachers are concerned.
Thought this advice might help some people.