So, I think—. Building on what I've just said, I think the risk would be that bad debts in the sector would go a lot higher.
Now, I value, Chair, actually, the examples that you've given of constituents and other people who've written to you and told you of their difficult situations. One of the things we try to do in the executive in Ofgem is actually have conversations, have meetings, with a wide range of energy consumers in this country, so we understand on the ground what it feels like, what people are experiencing in different circumstances. Actually, I have to say, it wasn't set up like this, but I was speaking to a Welsh customer just last week who is disabled herself, she looks after an adult child who is also severely disabled and she lives with her husband who is also not able to work. So, they are very much the category of a seriously vulnerable, low-income household. And she has one of electricity and gas on prepayment and she wanted the other one to be put on prepayment as well. And I think it's really important to understand why that's the case. I asked her, and she said that it's because it gives her control over what she's spending; it enables her to avoid getting into an uncontrollable debt situation, which she wanted to avoid. So, she has that control.
We survey energy consumers routinely as part of our role in Ofgem, and, the last survey we did, two thirds of customers who have a prepayment meter believe that is the best option for them, and it's primarily—. And I've got the data here. The reasons they give for that are that they can control their spending, that they can budget more effectively, and that, for some of them, it gives them more—they say it's more convenient than other payment methods. So, that feels like an important bit of the evidence, and the Fuel Bank Foundation themselves said earlier this year that 80 per cent of their case load who are on PPM say that's their preferred payment method, and it's about giving consumers that control.
Now, what we would say in addition to that is two things: firstly, that it's—. There are some households for which we really don't think it's ever acceptable, because the self-disconnection risk is so high, and that's our high-risk category, if you like. It's a 'do not install' category. So, we would never want to see prepayment meters in those most vulnerable households.
The other thing we're trying to do through the code, and we will try and promote this further, is ensure that, wherever possible, a prepayment meter, if it is being used, is a smart one. So, that's basically a smart meter that can be put into a prepayment mode, and we think that's of real benefit to consumers. The vast majority of them find it easier to manage and to do the top-ups. They don't have to go to a top-up shop; they can do it through their smartphone. But they're also able to, if they are unable to afford the energy, and they self-disconnect, the supplier can see that on the system, and we've required the supplier to monitor that and to reach out immediately and contact that consumer and say, 'Why have you come off the supply? Is there anything we can do to help?' Some people, they go off to work, they turn off the supply, they don't need it on when they're not there, for example, but others may have real needs and may be really suffering and unable to afford their bill that day. And we have an obligation on the supplier to then offer emergency credit in those circumstances. So, a smart prepayment meter, we think can provide a more effective level of protection than the old-fashioned type that is still being installed in some cases and we want smart to be installed wherever possible, because we think it gives so much of a better experience and protection to consumers.