'There was a big bang and then all the ash. I could not breathe'
Terry O'Shea, 42, a construction worker from Worcester, who was in the carriage behind the one where the explosion happened at 8.51am, wept as he described the scene.
He said: "There was a loud bang and we felt the train shudder. Then smoke started coming into the compartment. It was terrible. People were panicking, but they calmed down after one or two minutes.