A Scotland Yard spokesman said a 57-year-old man was detained on suspicion of possession of a firearm

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…

The man, aged 57, was arrested on suspicion of possession of a firearm (CS spray) and causing a public nuisance on Tuesday, 9 September.