With 260 casualties and only one surviving passenger, the Air India 171 crash is one of the deadliest aviation incidents in recent history — and so far it’s proving to be one of the most frustratingly opaque.

Sumeet Sabharwal, 56, was the captain on the flight, while Clive Kunder, 32, was the co-pilot who was flying the plane. Together, the two pilots had more than 19,000 hours of flight experience - nearly half of it on the Boeing 787. Both had passed all pre-flight health checks before the crash.

Before one of its planes crashed just after takeoff last month, killing at least 260 people, Air India had been a symbol of the country’s global rise.

India's aircraft accident investigation body said on Thursday it was too early to reach any "definite conclusions" on what led to the deadly Air India Boeing plane crash last month that killed 260 people.

Doubts still remain as to whether bodies buried in India without being DNA tested a second time were correctly identified before being laid to rest. James Healey Pratt, an aviation lawyer at Keystone Law who is representing 20 bereaved families said that he was in contact with the Foreign Office and UK authorities.