Long before it was a worldwide hit for Rod Stewart, the Cat Stevens song 'First Cut is the Deepest' made a name for Ike and Tina Turner's former backing singer, PP Arnold.

PP describes the emotional connection she felt to the lyrics, having emerged from an abusive marriage shortly before recording it.

The song's original producer, Mike Hurst describes how he achieved the huge 'wall of sound' production using double drums, a huge string section, and a harp instead of a guitar to play the signature riff at the the start of the track.

There are many personal stories associated with the track: Carsten Knauff recalls a childhood sweetheart - his first true love - and explains why the Cat Stevens' version brings back bitter-sweet memories for him.

Rosemarie Purdy saw PP Arnold give an extraordinary live rendition at a club in Portsmouth in 1967. Never before had she seen such a heartfelt, emotionally charged performance. It's something she's never forgotten.

The Sheryl Crow version reminds Rachel Batson of a very difficult phase in her life; it's a song she says reflects her own faith journey.

And former Radio Caroline DJ, Keith Hampshire, describes the circumstances that led to him having a No.1 hit with the song in Canada. It was the first time 'First Cut' reached No.1 anywhere in the world.

Series about pieces of music with a powerful emotional impact.

Producer: Karen Gregor

First broadcast on BBC Radio 4 in April 2015.