Just over a year ago, a devastating crash involving three trains killed nearly 300 people and injured more than 800 in India’s eastern Odisha state. It was one of the deadliest train crashes in history. But this isn’t the only crash to happen on Indian railways – one of the largest railway networks in the world. Lucy Hockings talks to Alessandra Bonomolo – the director of a new BBC documentary about last year’s collision called Why Trains Crash - and BBC India correspondent Soutik Biswas. They discuss why so many train crashes happen in India. Could the Odisha rail crash have been prevented - and are we doing enough around the world to make our railways safe?

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Producer: Alice Aylett Roberts and Tom Kavanagh Sound engineer: Gareth Jones and Ben Andrews Assistant editor: Sergi Forcada Freixas Editor: Richard Fenton-Smith