It was a very long walk to Aberdeen, and well after 4pm when we reached the city centre.

Our first stop was the railway station. The people waiting on the platform watched a bunch of workers busily repairing the track. A bored child tossed a stone on to the line.

Moments later a train pulled into the station. The workers jumped clear, but the stone still lay in the train’s path. The train hit the stone, swerved violently, then fell sideways onto the crowded platform with an enormous crash.

Many were killed in the crush. One woman – a tall blonde doctor in her thirties who was at the scene at the time of the accident – lost three of her four children. Only her toddler survived.