Air India plane crash investigators have found both of the Boeing 787's "black boxes," hopefully brining an understanding of the cause of the disaster a step closer.

An Air India Boeing 787-8 flight headed for New Delhi returned to Hong Kong shortly after takeoff Monday because of a "technical issue," Indian Media reported.

Bob Blackman, MP for Harrow East, said it was believed to be the highest number of British deaths ever recorded in a plane crash, with 53 UK nationals on board.