As is normal, since returning we have seen a surge in the prevalence of the common cold. For clarity, if a child develops a high temperature or a continuous cough it must be treated as a possible COVID-19 symptom, the child must isolate and get tested.
The NHS definition for each of the three COVID-19 symptoms are:
Only people with symptoms should get tested. If the child is symptomatic and the parents are not, only the child should be tested.
If the child tests negative then self-isolation can end.
If the child tests positive then self-isolation continues for the child and their household. Members of the household should still only get tested if they develop symptoms.