Robert Plant is against reforming Led Zeppelin full-time as the singer fears the results could be disappointing, he has revealed.
There has been huge clamour for the legendary rock band to reunite since their one-off charity concert in December 2007 but Plant had insisted he was uninterested in rejoining full-time, having found new success through his collaboration with country singer Alison Krauss.
Guitarist Jimmy Page's manager last month confirmed the band are "over" and speaking to Absolute Radio DJ Ben Jones, Plant has clarified why he had remained against the Whole Lotta Love group reforming.
"I think the thing about it is really, is that to visit old ground, it's a very incredibly delicate thing to do," he said.
"The disappointment that could be there once you commit to that and the comparisons to something that was basically fired by youth and a different kind of exuberance to now, it's very hard to go back and meet that head on and do it justice.
"The reason that it stopped was because we were incomplete, and we've been incomplete now for 28 years [after the death of original drummer John Bonham]," he continued.
"And no matter what you do, you have to really guard the discretion of what you've done in the past and make sure that you have all the reasons in the right place to be able to do something with absolute, total conviction."
Plant and Krauss' 2008 album Raising Sand was critically acclaimed and nominated for five Grammys and the pair confirmed they are to record a second LP together, called A Gated Community.
"I couldn't even have imagined this, it's just really quite something very, very different and very challenging," Plant said of singing with Krauss.