Ed: I had a feeling that what I’m trying to do is, I’m trying to make sort of sacred music. I listen to a lot of Alice Coltrane, devotional music. I love it, but I don’t want to force it. It has to be a very natural thing, because I also like powerful music. When you hear a track like “Kashmir” by Led Zeppelin, there’s a power to it, there’s a sacredness to that music. I think Zeppelin touched those moments really brilliantly. I listened to [John Coltrane’s] A Love Supreme a lot, trying to understand the language of that, or just the feeling of that. I never force anything, it’s just what comes out, and it’s like feeling, okay, that feels right.

In Wales, that connection feels even more tangible. Once an avowed city dweller, O’Brien bonded with the land after buying a house on the remains of a Roman villa surrounded by valleys, ancient oak trees and running waterways. By a strange coincidence, it’s a stone’s throw from Bron-Yr-Aur, the cottage where Jimmy Page and Robert Plant laid the groundwork for Led Zeppelin III.

“When you go to this land, you understand Led Zeppelin in a way that goes deeper,” he says. “When you hear The Battle Of Evermore – man, it’s like being on the top of fucking Plynlimon, the highest point in mid-Wales, and you feel it.