61.   The refugees entered the tunnel after taking advantage of a period when there was little rail traffic.

62.   The truck on which the blaze started was already on fire before it entered the tunnel at the French end.

63.   Trucks carrying hazardous material or those bigger than normal will not be allowed to enter the tunnel at all, his statement said.

64.   The attempt to enter the tunnel repeated a pattern seen before but on an unusually large scale.

65.   The locomotive had just entered the tunnel when an empty carriage towards the rear of the train jumped the rails.