Re: Who?
They were advertising a bit around town. Postbox flyers and posters.
I remember looking at their coverage and whilst my central London place wasn't covered, the website used to show a map of where they were looking to place if they had more interest (can't seem to find it anymore) but I do remember that it was mostly, if not all, big blocks of residences (presumably the most cost effective way but meant it was going to be a long time coming to me).