He swallowed some sleeping tablets, put on his wetsuit and entered the sea at Manhattan Beach, not far from his home.

ECONOMIST: Joseph Wolfson

The inquest in Stourport heard a statement from an accident and emergency doctor who treated Mrs Mann after she took the sleeping tablets.

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The habit can be caused by being overweight, drinking alcohol, having collapsed airways, a blocked nose, or by taking some types of medicine such as sleeping tablets before bed.

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Surprisingly, this did not depend on the class in which passengers travelled, the amount of fluid or alcohol they consumed, whether they smoked or whether they took sleeping tablets (thereby reducing their mobility).

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