Cyrus Mistry, a current director of Tata, will spend a year as deputy chairman under Ratan Tata until he takes over the reins in December 2012. He is the younger son of construction tycoon Pallonji Mistry, who owns 18% of Tata Group. Mr Mistry's family is India's seventh richest with a net worth of $7.6bn (£4.9bn).
