“This is an old song,” says AA Bondy, introducing the next number in his opening set at the third Club UNCUT night at the Borderline. He’s not kidding, either. What I had presumed would be some lost early gem from his back catalogue turns out to be a dark and powerfully brooding version of Blind Willie Johnson’s apocalyptic “John The Revelator”, originally recorded in 1930, which is going back some.