The families of the victims of the Air India plane crash in Ahmedabad last month have accused the Tata Group-owned airline of "forcing" them to make financial disclosures under the "threat of receiving no advance compensation".

Video footage showed it struggling to gain altitude and sinking back to the ground, where it hit buildings and exploded.Fresh reports indicate that apart from advanced payment of £17,200 and ex-gratia,

Three weeks after an Air India Boeing 787 crashed, investigators are still piecing together what went wrong. In the meantime, aviation safety experts have begun to narrow their thinking.