Fae Platten was 4 years old and was returning to London from a holiday in Tenerife.

Her mother had informed the airline Ryanair about her severe nut allergy, and the crew made three announcements asking passengers not to open any. Twenty minutes after takeoff, the girl started scratching her face. Then her tongue swelled, her lips blistered, and she lost consciousness.

Her family saved her with an adrenaline auto-injector, which stabilized her before landing. A few rows away, a passenger had opened a packet of nuts.

The airline identified him and banned him for two years, although it was never confirmed that the nuts were the direct cause. How many warnings does it take for someone to comply?

