I am grateful to the Minister for stating the developments for those customers who have the same energy provider for their electricity and gas supply. He says there are 14.8 million of them, but my question, which came up in Committee, is about those customers who have different providers for electricity and for gas. What will happen to them? How will they be able to measure the savings across their two bills? My conversations with many energy providers tell me that their systems do not currently speak to each other, and that to make them to do so would cost a great deal.