The Specials
From Jenny Everywhere Wiki
The Specials were an “English 2-Tone revival band” in at least one universe.
One of their songs, Man at C&A, seemed to discuss the Man in Grey, much to the surprise of Callum Phillpott when they first discovered it, as they had previously believed that they had invented the character as far as their reality was concerned.(PROSE: Annals of the Jen: One Year of Jenny Over-There: The Birthday Toaster: Notes)