If you live alone and you have symptoms of coronavirus illness (COVID-19), however mild, stay at home for 7 days from when your symptoms started.
if you live with others and you or one of them have symptoms of coronavirus, then all household members must stay at home and not leave the house for 14 days. The 14-day period starts from the day when the first person in the house became ill.
So far the advice has been that that we should keep schools open to reduce the pressure on the NHS and on other public services. But this has always been a balanced judgement and kept under constant review.