The subway poems would obviously be required to include Edwin Morgan. I love his Glasgow Sonnets and the last line of this one is haunting:
from Glasgow Sonnets
A mean wind wanders through the backcourt trash.
Hackles on puddles rise, old mattresses
puff briefly and subside. Play-fortresses
of brick and bric-a-brac spill out some ash.
Four storeys have no windows left to smash,
but the fifth a chipped sill buttresses
mother and daughter the last mistresses
of that black block condemned to stand, not crash.
Around them the cracks deepen, the rats crawl.
The kettle whimpers on a crazy hob.
Roses of mould grow from ceiling to wall.
The man lies late since he has lost his job,
smokes on one elbow, letting his coughs fall
thinly into an air too poor to rob.