My dad's twin sister (on the left of my avatar) and their younger brother lived side by side when married after the war in prefabs, somewhere a couple of miles of Rochdale Road - would that be Heaton Park? If so, I remember them looking like the ones in Liverpool Annie's photo.
They loved them but years later were moved into high rise flats somewhere in Harpurhey, which they hated, because the entrances got dirty and smelly and they didn't feel safe.
Lizzie