The intercom
You might recall, earlier, I mentioned that Clara rang the intercom during my viewing.
So did the cleaner.
And Phil when to answer it both times.
Well, that intercom, which looks like a wall mounded phone, was broken when I moved into the property. The part you speak and listen through lived on the floor, at the end of a stretched-out wire, because the part that held it onto the wall unit was missing. Due to this, the part you speak and listen through didn’t work.
Phil used it twice, so was aware that it was broken in a way that not only made it unusable, but that made it a trip and fall hazard, yet he could be bothered to have it repaired.
The psychotic girls guide to surviving the human apocalypse 