Veteran rocker Robert Plant has cast further doubt on a Led Zeppelin reunion tour, because he’s not ready to pledge his full commitment to the group.

Plant joined his fellow bandmates for a one-off tribute concert in London last December (07) and fans have been waiting for what they feel is an inevitable world tour announcement ever since.

And while guitarist Jimmy Page has vowed to consider a tour after Plant concludes his string of live dates with new musical partner Alison Krauss, the singer admits going on the road with the legendary band is not one of his top priorities.

He says, "I really enjoyed playing with my friends, and we are a lot closer because of it. But the responsibility, the whole deal, it’s a whole different thing to what I’m doing with Alison."