The RMS Titanic set sail from the UK a hundred years ago today. But in the early hours of the 15th April 1912 the 'unsinkable ship' did just that. Despite all the boasts of the vessel's sturdiness it was an iceberg that carved its place in history a century ago.

That night a man from Wales was etched into its story after saving dozens of lives. As the disaster unfolded, the Titanic sent an SOS stating: "We have struck an iceberg. Sinking fast. Come to our assistance."

On-board, a Welsh officer was doing what would lead others to later describe him as a hero.

Fifth officer Harold Lowe from Barmouth was asleep in his quarters when the ship hit the iceberg.

He rushed on deck and began coordinating the passengers getting into lifeboats, firing his pistol to maintain order.

He pulled four people from the freezing waters, three of whom lived. He saved a further dozen passengers from a sinking boat, and took another swamped boat in tow steering them throughout the night to safety.

My Grandfather just went about the job he knew - to try to get the lifeboats with people in them away, and have no accidents. My grandfather loaded number 14 and went on-board with her. He collected four other lifeboats, tied them together and then dispersed his passengers into other lifeboats so that he had an empty lifeboat to return.

A plaque for the Welsh hero will be unveiled later this week at the former home of Lowe in Deganwy, Llandudno.

You can see a special programme on the disaster - 'The Dagger in the Night: Welsh Heroes of the Titanic' - tonight at 7.30pm on ITV 1 Wales.