The lyrics posted by Peace above are the lyrics sung by the band Flogging Molly on their album "Drunken Lullabies," 2002. The song is called THE KILBURN HIGH ROAD, and the band members are credited as authors. (I suspect it's taken from an older, perhaps out-of-copyright source, though.)

Aside from the fact that the play perhaps takes its title from this song, I don't see any connection to the song that Sarah requested.