Passengers on the Southeastern service were asked to move off the train or into a separate carriage as an off-duty midwife, nurse and police officer came forward to help.

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The 24th carriage came off the track, derailed, and then set itself right.

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Some of the bogies (the swivelling device which holds the wheels to the carriage) shear off and several coaches begin to tilt.

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That is because the radio waves produced by each phone are reflected off the metal walls of the carriage, bus or lift.

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Up till then, rounded trunks had been the norm, since a curved lid meant rain would slide off as they were transported by carriage and coach.

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Firstly, all passengers who want to get off should be allowed to do so quickly - which means those eager to board the carriage ought to stand well back.

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