Air India is facing fresh turbulence following last week’s fatal crash as additional safety inspections on its Dreamliner fleet have led to flight delays, cancellations and growing passenger anxiety.

In 2012 a Boeing jet was deliberately crashed in the Sonaran desert, Mexico and filmed it for television. The test revealed the safest seat to sit in.

There have been cases of a very small number of survivors in very serious accidents, but it is "very rare" for there to be only one, a professor told Newsweek.