The first 1 minute and 23 seconds of this are beautifully adapted from the main theme of Morricone's "Once upon a time in America" ("Deborah's theme"). Well, the first line of the vocal melody of this is actually directly lifted from Morricone's first line, but we won't over-emphasise the point. (I just hope Ennio got his royalties!). The vocal performance of Shane McGowan of the Pogues is something one can either see some merit in or not, but it has a certain musical expressiveness.
The same "Deborah's theme" is used again repeatedly in the second half of the track, particularly the instrumental fade, but nowhere with the effectiveness of the first 1:23.
Bedroom electro-dance music by some Scottish guy. Genius it certainly isn't, but there is a certain kind of intrinsic lyricism about some of his ideas that appeals. His album samples Judie Tzuke's "Stay with me still dawn" and Kim Carnes's "Bette Davis Eyes" as well as, famously, Gloria Estefan/Miami Sound Machine's "Doctor Beat".
Nice chord sequence. The melody of the lead vocal and its delivery tend to grate on me, though. I'm fairly sure this song was the inspiration for "Dirty Postcards" by the Korgis, which will of course be well known to all who read this.