//No doubt douglas we'll get the stories that it allows the suppliers to turn off your electricity on a whim or that there spying on you and will start to charge a higher rate at the times you use lenergy//
Smart meters would allow a supplier to disconnect supply remotely. They'd only do so when necessary (as they do now when necessary) and not on a whim. The only way they'd be able to spy on you is to monitor your energy usage. Quite why they'd want to do that is anybody's guess. What they can (and almost certainly will) do is introduce differential pricing. They'll charge you more to turn your CH on when its cold and more to switch the lights on when it's dark. Here's one article that outlines the idea (others are available):
https://www.mckinsey.com/industries/electric-power-and-natural-gas/our-insights/solving-the-rate-puzzle-the-future-of-electricity-rate-design
"Utilities need to implement a time-of-use (TOU) pricing component for energy and demand charges, under which prices are higher during peak periods. Consider if electric vehicles were charged at peak times; they would create a substantial burden on the electricity grid and necessitate capital investments. But a TOU-linked demand charge would help stimulate optimal charging behavior (such as charging overnight when demand is lowest)"
This is no scare story. This will happen. And so-called smart meters are the tool to facilitate it.
What a smart meter will not do is save you money. The "On/Off" switches provided on your lights and other appliances will do that.