The UK government has introduced a traffic light system to support the safe restart of international travel. Decisions on red, amber and green list countries are taken by ministers informed by risk assessments provided by the Joint Biosecurity Centre alongside wider public health factors. This includes international transport hubs.
Passengers must follow the applicable requirements for the highest risk country or territory that they have been in or passed through in the previous 10 days. This includes transit stops. Passengers are also required to record the countries and territories they have transited through on their Passenger Locator Form.