Fourteen years after their Grammy-winning debut, the roots duo have reunited – facing high expectations. They explain how they left their comfort zones with a ‘nuts but tasteful’ all-star band

More than half a century since arriving to play his first show in the US with Led Zeppelin, Robert Plant was in the strange position of having to explain himself to the authorities.

“I had to prove that I was contributing to the betterment of the American system somehow, which is kind of cute, really,” Plant says of this post-lockdown trip to Nashville. He is sitting in the city’s famous Sound Emporium studio with his collaborator, the bluegrass legend Alison Krauss. It is the same place where they recorded their second, highly anticipated record as a duo, Raise the Roof, before the pandemic put the world on pause.