Songfacts®:

• Robert Plant provides guest vocals on this track. The acts have recorded together in the past, with Plant playing harmonica on Primal Scream's 2002 track "The Lord Is My Shotgun," but this was the first time he sung with them.
  
  The collaboration came about after Primal Scream members Andrew Innes and Bobby Gillespie bumped into Plant in the queue at Primrose Hill post office, which is near his home and Primal Scream's London recording studio. Innes told The Daily Record: "Robert has a house near our studio. It is bizarre. We see him in the post office all the time. "We were in the post office when he asked us what we were up to and Bobby told him we were working on the new record.
  "He made the mistake of asking if we needed any help, so we got back to him and asked him to come and help us out.
  "We also meet him from time to time in the nearby Russian tea room and walking down the street. It is weird to think, 'Here's the hammer of the gods coming'. But you don't want to be at the back of the post office queue with Robert Plant on pension day."
• Plant told Mojo magazine: "I sang a bit on the Primal's stuff, because I think their references on looking back on the glorious past and the way they bring them into the contemporary world are fantastic."
• Robert Plant was a "production choice." Gillespie told NME: "We brought Robert in not because of who he is, but for the sound of his voice. He sings beautifully on it. You might not even know it was Robert Plant if you hadn't been told."