Do mistakes with energy bills happen? Cast your minds back a year, before the cost-of-living crisis kicked in and before 27 energy firms went bust.
The energy Regulator announced that over a few years previous, 1million people had been overcharged £7.2million by 18 energy firms. And that was just as a result of switching suppliers.
So before the current situation, in just one aspect of energy billing, things were already going very wrong.
