Lost audio of a Led Zeppelin swimming pool concert has been found at a car boot sale in Ipswich, England.

The rare live recording from the rock band's 1971 show at St. Matthews Baths Hall was unearthed by a collector who was rummaging through CDs at a car park sale of second hand items and bric-a-brac.

The lucky buyer, Vic Kemp, tells the Evening Star newspaper, "The guy who was selling them (CDs) said, 'You might be interested in this.' It doesn't have a proper cover and the title is just written in felt-tip pen... The recording is not too bad at all.

"It must have been recorded by someone standing at the front with a microphone. You can hear Robert Plant talking to the audience quite clearly."

Like Led Zeppelin, the Baths Hall is no more - it closed as a music venue in 1984 and currently stands empty.