This is just a thought.... and as some of you know, I am not in Australia, I am in Canada.. so perhaps some things are different.... however, I am close to someone who works for our 'Victorian Order of Nurses (VON)', a highly regarded nursing service that has been around for a long time. This person travels from client to client during the course of his work shift, in his own vehicle, to provide nursing assistance to those in need of assistance yet still living in their own homes. He is not allowed to park in the clients' driveways, it is against the rules. No idea why, although around here, it makes sense, because you could potentially be blocking another household occupant from either entering or exiting their own driveway. With huge long driveways, it wouldn't matter obviously, however, the rules are the rules. Just a thought that perhaps something similar could exist over there, and this could easily be an explanation for why the cars were there i)early in the morning; ii)for a certain, perhaps extended length of time; iii)not parked in the driveway; iv)with the windows down (safe neighbourhood/hot/nothing to steal in the car?);
Also, clients sometimes require a two-person visit for various reasons, ie perhaps if there might be heavy lifting of a patient involved. Or sometimes there are team meetings involved, where say a worker, and a supervisor or planner, might both attend a meeting at the client's home to review needs/reassess, whatever. I wonder if GJ has checked out all of these types of services, which I'm sure must also exist over there, to see if anyone on the street may have been receiving services that morning?
Sorry for the lack of paragraph formatting :/