A lost version of Led Zeppelin's rock anthem Stairway To Heaven is to feature on a remastered release of the band's Iv album later this year (14), despite an ongoing spat with the estate of the late Randy California over the epic song.

U.S. attorney Francis Alexander Molofiy is attempting to take the British rockers to court over claims Stairway to Heaven was inspired by his late client's track Taurus, which he wrote as a member of late 1960s act Spirit.

Back in May (14), Molofiy announced he was hoping to prevent Led Zep from releasing the remastered album, stating, "The idea behind this is to make sure that Randy California is given a writing credit on Stairway to Heaven. It's been a long time coming."

Led Zeppelin star Jimmy Page has called the legal threat "ridiculous" and now he has discovered an alternative take of one of the most celebrated songs in rock in the group's archives, and he's planning to release it after 40 years.

The new version of the song will feature on a companion disc to the new release, which will also include other alternative versions of Iv tracks.