This is the only fact I have about Jim Guthrie.

As they show the “Hands in my Pocket” advert all of the time here (still) and that’s the only fact I have about him, when I hear the song, instead of singing “Hands in my pocket, hands in my pocket, hands in my pocket” I sing

“I am Justin’s flatmate, I am Justin’s flatmate, I am Justin’s flatmate.”

As you can see, it fits perfectly, therefore, those must be the original lyrics.