“I Won’t Let You Down” is a song by British band Ph.D., released as the second single from their eponymous debut studio album (1981). It entered the Australian charts in October 1981 and reached number five; it entered the UK Singles Chart in April 1982 at number 34, peaked at number three the following month. It went on to become the 23rd best-selling single of 1982 in the UK.
It was the band’s biggest selling single and became one of lead singer Jim Diamond’s signature songs (the song is often incorrectly credited to Diamond himself). Diamond re-recorded the song on his eponymous 1993 album Jim Diamond with a slightly different arrangement, and it remained a staple of his live shows up until his death in 2015.
