Rapid Covid testing centres are still up and running across Hertfordshire. Credit: PA The latest list of local testing sites for people with no coronavirus symptoms has been released ahead of the return to school. Rapid testing sites have been up and running across Hertfordshire since January, primarily aimed at key workers and other members of the public who cannot work from home. The lateral flow tests are able to tell someone whether they unknowingly have Covid within 45 minutes of taking a test. With schoolchildren heading back into the classrooms this week, it increases the risk of coronavirus spreading across communities.