Thought i'd share my experience: Smart meter fitted about 7 weeks ago. It quickly confirmed what I knew - that we were using a lot of electricity.
One quiet morning I decided to find out what might be possible, how low could it go?:
One by one I powered down EVERYTHING until I reached zero energy use, and then one by one found out what each appliance or device was consuming albeit in standby mode for the most part.
It clearly identified a culprit and what seems to be for a massive 40%+ of my bill. That item has now been switched off for the entire month and lo and behold my monthly usage has dropped significantly, and my bill fallen from high £90's to just under £60 for the month.
Okay, it is the summer and consumption "ought" to be lower in any case although we have never witnessed that particular phenomenon as our usage/bill has always been around the £90-100/month mark.