Jimmy Page: How we wrote Stairway to Heaven
10 October 2014 Last updated at 00:12 BST
Stairway to Heaven was one of the biggest rock songs of the 1970s - loved, imitated and sometimes parodied.
Now Led Zeppelin's classic track is back on the turntable, on a re-mastered version of the band's fourth album.
Forty-three years after its release, the song continues to hold a place in many music fans' hearts.
Guitarist Jimmy Page gives a personal account of how a rock anthem came together.
Camera: Dave O'Neill, Richard Kenny. Editing: Dave O'Neill. Producer: Amanda Bruckshaw