Exploring the Britannic: the life, last voyage and wreck of Titanic's tragic twin

Launched in 1914, two years after the ill-fated maiden voyage of her sister ship, RMS Titanic, the Britannic was intended to be superior to her tragic twin in every way.

But soon after her launch war intervened and in 1915 she was requisitioned as a hospital ship.

Just one year later, while on her way to collect troops wounded in the First World War's Balkans campaign, she fell victim to a mine laid by a German U-boat and tragically sank in the middle of the Aegean Sea.

There her wreck lay, at a depth of 400 feet, until it was discovered 59 years later by legendary explorer Jacques Cousteau.

Since then a succession of expeditions, including one by Robert Ballard who discovered the wreck of the Titanic, have uncovered more about the Britannic and life on-board ship than anyone could have hoped for.