Truly??
I don't think this is what you're looking for, but in "Who's Thrown Away Her Tom Cruise Photographs?" I thought I saw the number 11 on the red door of the house next to Auntie Wainwright's shop. No idea who lives there.
Coggy Duckworth.
Another wild guess.........Roz??
Foggy. The house we see in the bicycle polo episode.
I'll guess Marina.
Bloody wainwright.
Norman Wisdom aka Billy Ingleton??