Read this: The 10 best Judas Priest albums
Rob added of the progress of this blues record: "We're slowly putting bits and pieces together. There's no timeline on it. We're kicking the tires, and I've already got some bits of ideas here and there, and they sound great."
News of the frontman's latest endeavour follows his comments last year that Judas Priest will "definitely" have another album on the way.
"Judas Priest is on a roll and we’re on fire with this music," he said while they were touring 2018's Firepower. "The reaction, the support from our fans, and everybody is what gives you that thought of, 'What would happen if we did another song, then another song and then an album? We might as well go out and tour again.'"
Check out Rob's new interview below: