Please find the government advice:

 

When a child, young person or staff member develops symptoms compatible with coronavirus (COVID-19), they should be sent home and advised to self-isolate for 7 days and arrange to have a test to see if they have COVID-19. They can do this by visiting NHS.UK to arrange or contact NHS 119 via telephone if they do not have internet access. Their fellow household members should self-isolate for 14 days. All staff and students who are attending an education or childcare setting will have access to a test if they display symptoms of coronavirus (COVID-19), and are encouraged to get tested in this scenario.

 

Where the child, young person or staff member tests negative, they can return to their setting and the fellow household members can end their self-isolation.

Where the child, young person or staff member tests positive, the rest of their class or group within their childcare or education setting should be sent home and advised to self-isolate for 14 days. The other household members of that wider class or group do not need to self-isolate unless the child, young person or staff member they live with in that group subsequently develops symptoms.

As part of the national test and trace programme, if other cases are detected within the cohort or in the wider setting, Public Health England’s local health protection teams will conduct a rapid investigation and will advise schools and other settings on the most appropriate action to take. In some cases a larger number of other children, young people may be asked to self-isolate at home as a precautionary measure – perhaps the whole class, site or year group. Where settings are observing guidance on infection prevention and control, which will reduce risk of transmission, closure of the whole setting will not generally be necessary.