From today, anyone who tests positive for coronavirus will be contacted by NHS Test and Trace and will need to share information about their recent interactions.
This could include household members, people with whom they have been in direct contact, or within 2 metres for more than 15 minutes.
People identified as having been in close contact with someone who has a positive test must stay at home for 14 days, even if they do not have symptoms, to stop unknowingly spreading the virus.