Whilst on this subject, what about smart gas meters? How do they get information back? Are both meters connected? Or do gas meters have batteries in them for a radio link?
We have 'dumb' meters, and I'd love to get shot of the chore of reading them, but given their positions, anticipate problems with wireless connections.
I was told that a government standard was to be imposed so that you could change supplier at the drop of a hat without having to change the meters, but this doesn't of course preclude more than one method being used.