Fifty years after the 1969 dive team say they found the Falcon Blanco we take to the water. The enormous scale of what is ahead reveals itself. A nasty shock about the origin of the cannonball.

'Treasure Island: The Hunt for the Falcon Blanco' is the story of a 400-year-old mystery wrapped up in a modern day hunt for sunken Spanish Armada gold. Journalist Philip Boucher-Hayes investigates the claims of a group of divers to have found a wreck fifty years ago, before diving the site himself.

'Treasure Island: The Hunt for the Falcon Blanco' is the story a 400-year-old mystery wrapped up in a modern day hunt for sunken Spanish Armada gold. Journalist Philip Boucher-Hayes investigates the claims of a group of divers to have found a wreck fifty years ago, before diving the site himself.