A British-led team has recovered a $50m trove of silver coins that has lain on the seabed since the steamship carrying them from Bombay to England was sunk in 1942. The SS City of Cairo was torpedoed 772km south of St Helena by a German U-boat and sank to 5,150m. The 100 tons of coins, recovered in the deepest salvage operation in history, belonged to HM Treasury.