I thought part of the justification for smart meters was so I as a consumer could see my household consumption and if appropriate react - ie switch of a left on towel rail.
I don't have a smart meter but I can - and I find this useful. And all courtesy of British Gas. It was a freebe.
It consists of a magnet to go round a supply cable and a remote display. Ok it may not be very accurate but I don't need precision to see that consumption is unexpectedly high.
Another advantage is the display is on the kitchen surface not at the back of a cupboard.
Biting the hand that feeds IT
