My Lords, as always, I make the offer of a letter to all noble Lords who took part in the debate, because obviously I will not be able to pick up all the points. I am grateful for noble Lords’ general welcome for the regulations and our response to the NAO report.
The noble Lord, Lord Teverson, talked about this being a drop in the ocean given the large sums of money that are involved—we all know that a billion here and a billion there soon adds up to quite a large sum. Take, for example, AD, which was mentioned by the noble Lord, Lord Teverson, and the noble Baroness, Lady Featherstone. We know that AD will never solve
all our problems, but it can deal with a certain amount of waste. As was pointed out by the noble Lord, Lord Teverson, the important thing with any AD plant is to make sure that you have adequate waste as feedstock for the future. We do not want people producing waste for the sake of waste just to go into a plant. We want to use only genuine waste or, on occasion, to top it up with a certain amount of crops that are grown for that purpose. Principally, however, plants would be designed to deal with waste.
In my former life as a Defra Minister, I saw quite a number of AD plants taking in waste from very different sources. Where they were attached to a supermarket, one would see bucket loads of old yogurts or whatever else had gone past its sell-by date being tipped in. That was a good way of using it, and we want to devise schemes that will, as the noble Baroness rightly said, prevent that waste going to landfill. I saw excellent small schemes also. I remember one used by a salad producer, which took the waste from its own products—the stalks from tomatoes are actually rather difficult to break down—and used it to produce both heat and power to grow more tomatoes in due course, and used the digestate that comes out in the end to fertilise those tomatoes. It was, wonderfully, almost a closed loop. There are terrific advantages to AD, but, as we all know, it will not solve all the problems.
RHI will be an important step in helping to reduce carbon emissions and—I say this to the noble Lord, Lord Teverson—make progress towards the legally binding renewable energy targets that we have. As I made clear, we will certainly look very carefully at ensuring that there is suitable waste feedstock and that the scheme ensures current and future supplies to anaerobic digestion. If the noble Lord has a local problem in the south-west, it is important that he, and those in that world, brings it to the attention of the department when it is reviewing this matter. I assure the noble Baroness, Lady Featherstone, that my right honourable friend Claire Perry and the department will look constantly at these matters to make sure that there can be further tinkering to get it right.
The noble Lord, Lord Teverson, asked about solar thermal. My understanding is that it is eligible for both schemes, so it is already support by RHI. If he wants to look at that for his own domestic arrangements, he is welcome to do so.
As I said, I very much welcome what the noble Baroness, Lady Featherstone, had to say. I made it clear that we will keep these matters under review. I cannot give a precise date for when and how my right honourable friend will respond. I will certainly respond to some of the noble Baroness’s more detailed questions, particularly those relating to electrolysis and other matters, most of which I shall make a complete hash of if I try to respond to them now. I think all those taking part in this debate would be far more grateful for a written response.
The noble Baroness is right to raise the whole question of detecting abuses and gaming—something touched on by other noble Lords and which the NAO was wary of. As she pointed out, with any changes that we make, there are always potential unintended consequences, and we keep that under review. It is a large and
varied scheme, and the non-domestic scheme in particular has huge variation in size, heat and use and the technology used between projects.
Despite all those challenges raised by the NAO, the department—the former Department for Energy and Climate Change, which noble Lords on the Liberal Democrat Benches will know well because it was one of their great Secretaries of State who sat in that department, which is now within BEIS—is working with Ofgem and, I think, developing a better approach to identifying gaming. We will certainly respond to the NAO in due course.
The noble Lord, Lord Stevenson, also welcomed the changes, and I am again grateful. He particularly welcomed the assignment of rights, but was concerned that it might lead to a lack of access to loans or other finance for a number of businesses and that that could be a barrier for them. I can only say that we have no plans to widen the assignment of rights beyond the household sector at the moment, but we would always want to keep all matters under review.