This is extremely rare colour footage of the battle-cruiser HMS Hood and its crew at sea in 1939. Two years later, the ship and some of the men in this footage were at the bottom of the Denmark Strait after a fateful encounter with Hitler's flagship, Bismarck. Eighty years ago today, the mighty Hood was sunk with the loss of 1,415 lives - just three men survived - as she and brand-new battleship HMS Prince of Wales attempted to stop the Bismarck and cruiser Prinz Eugen raiding Britain's supply l