Looking at the profit cap on domestic users is interesting, but I do wonder to what extent the presumably higher margins on business energy drive up the costs of other goods/services, and how much of this is passed on to consumers. I wouldn't be that surprised if the potential saving for average households ends up being closer to the original £160 figure. Of course, not all of those goods/services will be necessities, whereas most domestic electricity/gas usage will be, so it's a bit of a different situation.