In a letter to headteachers, the DfE have said
“Children and young people who are unwell and have a high temperature should stay at home and avoid contact with other people. They can go back to school, college or childcare when they no longer have a high temperature, and they are well enough to attend
Children with a positive COVID-19 test result should try to stay at home and avoid contact with other people for at least 3 days, which is when they are most infectious.”