Terminal 4 at London Heathrow airport is now running normally after an emergency evacuation. Crowds of passengers gathered outside the terminal on Monday evening when police and firefighters were called to a “possible hazardous materials” incident. Dozens of flights were heavily delayed, with the last departure from Heathrow well after midnight.
Thousands of passengers from the UK’s busiest airport faced missed connections because their departures to hubs in the Gulf and beyond were up to four hours late.
