![Heathrow Airport on X: "A traffic light system is in place for international travel. 🚦✈️ Please ensure you check the status of the country you are leaving before travelling to the UK: Heathrow Airport on X: "A traffic light system is in place for international travel. 🚦✈️ Please ensure you check the status of the country you are leaving before travelling to the UK:](https://pbs.twimg.com/media/E2ZWp4lXoAkpT_q.jpg)
Heathrow Airport on X: "A traffic light system is in place for international travel. 🚦✈️ Please ensure you check the status of the country you are leaving before travelling to the UK:
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Traffic light nutrition labels slapped on the front of biscuits do work, study claims | Daily Mail Online
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