I have smart meters and pay monthly for what I use.
In April was forced to a new boiler, old one blew up. So swapped from a heat only to a combi. We cook with gas as well.
Last months gas was £28, same month last year was nearly a £100.
I've turned the temps down on the boiler, especially the hot water. No point paying to heat it and then needing to cool it back down by adding a load of cold.
I dont think the saving is purely new boiler, it looks like there may have been an issue with the old controls.
Plus the old gas fire, we dont use, is coming out and a multi fuel stove going in. Hopefully help in the winter.
Plus I'm going to zone upstairs and down stairs separately.