the lactic intruder

Sadly, all attempts to find the true owner of the rogue pint of semi-skimmed have so far come to naught, though there are still eight days left according to the stamp on the cap. The delivering dairy obviously can't give me the name of the household to whom it truly belongs, but a simple "north" or "south" would be enough to allow me to take it to the correct house without anything daft happening like a milk van making a whole journey for a single bottle.