I am also not sure how they are going to put it in the older houses you don't get any reception in them! Will they have a separate aerial?
Discussion
If the house has internet access and WiFi they will just piggy back off that signal.
Makes sense I suppose gets harder to do all the WiFi stuff with solid stone walls though. If they use cables or even the earth socket to transmit data around the house hopefully someone build an intercepter box or something. Perhaps it's easier just to tell them to fuck off or go full riot at that point!
Also, the meters generate their own signal that can be picked up by the reading unit.