This album is absolutely fantastic and you actually feel what is happening in the fairy tale.
The problem is that people do not know that Elena Kats-Chernin composed this music for a ballet "The Wild Swans" and every piece of music relates to something in the fairy tale. Eliza Aria (the music on the Lloyds advert is the piece composed about the Princess) who was turned mute after a spell was cast upon her by her wicked Stepmother.
In a faraway kingdom, there lives a King with his twelve children: eleven princes and one princess. One day, he decides to remarry. He marries a wicked Queen who is actually a witch. Out of spite, the queen turns her eleven stepsons into swans and forces them to fly away. They carry their fifteen year old sister Elisa to safety in a foreign land where she is out of harms way of her stepmother. There, Elisa labors mutely day and night knitting magic shirts from nettles to help her brothers regain their human shapes, as this is the only way to break the spell their stepmother forced them under. The king of another faraway land happens to come across the mute Elisa and falls in love with her. He grants her a room in the castle where she continues her knitting and eventually crowns her as his Queen and wife. One night Elisa runs out of nettles and is forced to collect more in a graveyard. She is spotted by the evil Archbishop who is looking for an excuse to accuse her of witchcraft. He convinces the King that Elisa is a witch and sentences her to death by burning at the stake. At the place of execution, the swans descend and rescue Elisa. The magic shirts are donned and the brothers return to their human forms. Elisa regains her voice and explains the reason for her mysterious work to the king. Elisa's courage prevails and she is forever reunited with her brothers. (taken from Wikipedia).
I hope this helps!