Plant, 60, said he has moved on to other things and was getting too old for two-hour rock shows in giant arenas across the world.

"I'm doing very well with Alison and I'm enjoying that, Plant said. "I still see Jimmy quite a lot and he's very complimentary and supportive of what I'm doing. But we are in different places now and you have to go on to do different things." - more on this story

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