According to Dave Cousins, the chapel's pipe organ was used, played by Alastair Ross, choirmaster and organist of St Lawrence's Church, West Wycombe;[1] the band's keyboardist, John Hawken, chose not play on the recording, as he was not used to the very noticeable delay that falls between the pressing of a key on a pipe organ and the sounding of the corresponding note.
[1] The title derives from the refrain "You are my saving grace/Darling, I love you," which references the Victorian heroine Grace Darling.
The song compares the singer's paramour to the famous lighthouse keeper's daughter, expressing gratitude that she is steadfast and has helped him through dark times with her constant love.
The predominant instruments are the pipe organ and the choir, giving the song a classical or hymnal feel.
The sleeve notes to the 1998 CD re-issue of Ghosts report that a promotional video was recorded for the single featuring an interview with Cousins on a lifeboat.