A passenger having a mental health episode was heading for the emergency exit. He lunged for the door handle, screaming

I write thrillers: mostly ­historical mysteries. In September 2024, I was returning from a ­literary festival in Italy, where I had been talking about my ­latest book. It was a Ryanair flight, and as we came in to land at London Stansted, I heard people behind me shouting. I looked back to see some of them were standing up. A moment later a big man – I would guess he was 6ft 4in, and powerfully built – burst through them. He headed towards an emergency exit and lunged for the door handle, screaming. Behind him, a smaller guy was clambering over the tops of the seats, shouting: “It’s not terrorism. It’s not terrorism. Mental health!”

While exit doors can’t be opened when a plane is at full altitude because the air pressure inside is too great, levels dip during descent, and it is possible to open them. I feared that if he opened the exit, the plane would be hard to control and we might hit the ground about 300mph faster than we were meant to.