A ballad called Love Will Set You Free is the UK's entry at the Eurovision Song Contest, it has been revealed.

Sung by veteran crooner Engelbert Humperdinck, it premiered on the official Eurovision website on Monday.

This year's song has been written by Grammy award-winning producer Martin Terefe and Ivor Novello winner Sacha Skarbek, who co-wrote James Blunt's You're Beautiful and Lana Del Rey's Born To Die.

Love Will Set You Free is a tale of heartbreak with a simple, sparse arrangement of plucked Spanish guitar and melancholy strings.

"The more you listen to it, the stronger it gets," said Humperdinck. "It's not a one-time listen."