Had a cold call from someone claiming to be from EDF offering me a smart meter. I've no real view on whether I want one or not. He tried to 'sell' it by saying it did a reading automatically and sent it via its phone link. I said it was no hardship for me to read my meter as it's very accessible.
He then said that my reading was only an estimate, and the smart one would be much more reliable. Asked him to explain, and of course he couldn't...