Sorry for late replies, away at work,
Yes, pretty sure they saw meter going backwards, they came a day early on the reading before last so it would have been going backwards.
So, two days ago they came and changed us to a smart meter, wife had to sign, and the man said we good to plug back in now haha.
Obviously it will delay ROI but will get there eventually.
The man also said they were changing a lot of people with solar to smart meters so sounds like they are actively looking so beware