There have been several threads on this, so going back to look at these may be of help.
We have a smart meter and even before we changed supplier, rendering it useless, we found it of no use at all in cutting consumption. A washing machine costs the same amount to run a load whether you monitor it or not. What reduces bills is planning washing machine use so that you do as few loads as possible
The meters do not tell you how much each appliance is using, only how much electricity you are using at any given time. To find out how much electricity a washing machine uses you will need to turn every other electricity consuming entity off: lights, central heating, all computers and so on. Much easier to just go online and google for washing machine operation costs for your model of washing machine.
We halved our fuel consumption by half between 2000 and 2010. We did it using just a a quarterly bill. We just went round the house gradually changing all the light bulbs to LEDs, putting extra insulation in, using the washing machine and dishwasher less and so on and so on.
Smart meters are being installed because it will make meter reading and billing easier. Any other claimed advantages are just window dressing.