A 'possible hazardous materials incident' saw Terminal 4 shut for around three hours shortly after 5pm on Monday, forcing crowds of people to gather outside while emergency crews rushed to the scene.

A 'possible hazardous materials incident' saw Terminal 4 shut for around three hours shortly after 5pm on Monday, forcing crowds of people to gather outside while emergency crews…

Holidaymakers told not to travel to the terminal as firefighters called to deal with the incident