Think Ewan macoll aways wanted it to be sung by city fans he was just ahead of his time and had to wait until we moved to the Etihad. Geographically the ground is next to the gas works wall and the old canal, plus all the old factories in the area. Smelled the spring on a smokey wind relates to clayton aniline or maybe a weed farm in someones loft on beswick estate. It also references the moon and cats are prowling upon their beat must be the kool cats.
I presume the siren from the docks line is to show that some kind of warning siren is sounded to let normal people know they've let the zombies out at the swamp.