Someone came yesterday and read my old meters. I have had s smart meter for about a year. Surely the numbers will be useless.
I had this happen a few times with my previous supplier Ecotricity, and it turned out the smart meters weren’t connecting properly. We ended up with a huge bill for the difference after about a year despite the fact I flagged it up several times with them and they did nothing about it. It might just be worth checking that your meters are actually sending data.