Covid-19: Unknown person with Brazilian variant traced to Croydon Croydon Council will be working alongside the NHS Test and Trace to provide extra testing. Pic: Jakayla Toney An unknown person infected with the dangerous new variant of Covid, originally found in Brazil, has now been traced to Croydon, officials have disclosed. Officials believe the person has not infected anybody else as they were self-isolating after a trip to Brazil, however extra testing is being carried out around parts of South London as a precaution, including their contacts. The specific location of the person has not been disclosed, buyt Croydon Council said it would be working alongside the NHS Test and Trace to provide extra testing in South Norwood and Thornton Heath area.