After one day of school, my son and 30 other pupils are self-isolating at home for 10 days after one child had a positive school lateral flow test. However confusion has reigned over the issue of 'false positives' returned by initial lateral flow tests. Students, however, who test positive in a lateral flow test at school during the early phase will not get a confirmatory PCR test. 'But children who receive a positive lateral flow from a test taken at home, they will require a PCR test. 'If a PCR test is negative following a positive lateral flow, children can go back to school.'

Source: Daily Mail March 10, 2021 14:42 UTC