In another change to the guidance, the DfE guidance for mass testing in schools has now been updated to say:
Should I still take part in the asymptomatic testing programme if I have recently tested positive for COVID-19?
If staff have recently (within 90 days) had a positive PCR test for COVID-19, they are likely to have developed some immunity. Individuals are exempt from testing by both PCR and LFD within 90 days of a positive PCR test, unless they develop new symptoms.
However, individuals may choose to take a LFD test after the isolation period, for example as part of a workplace or community testing programme. This should only be done after completion of the required self-isolation period as per the NHS stay at home guidance. If they test positive with a LFD test, they will be required to self-isolate for 10 days or longer if symptomatic.
They are still required to self-isolate if they are identified as a close contact of a positive case, even if this is within the 90 day window.
For note, the most useful guidance for schools is found on the schools document sharing platform which is here. Take a look at the FAQs, as they are regularly updated:
Primary schools: Frequently asked questions - Google Drive
Secondary schools: Frequently Asked Questions - Google Drive