Ground-mounted Solar Panels: Alternatives

I beg to move,

That this House has considered the matter of alternatives to ground mounted solar panels.

It is a pleasure to serve under your chairship, Mr Stringer. I sensed the people coming into the Chamber in the last couple of minutes and I felt a quickening. It was like energy coming together, which is completely appropriate given what we are here to debate: alternatives to land-based solar panels.

The context in which I wish to couch this debate is twofold. One aspect is local and one slightly more geostrategic. People say that in politics, where you sit defines where you stand. Hon. Members may or may not know that I am the proud Member of Parliament for Spelthorne. I sometimes feel the need to remind hon. Members that Spelthorne is not in Lincolnshire or Lancashire; it is, in fact, everything south of Heathrow airport until hon. Members get to the River Thames.

When I was elected, at the last election, to be the Member for Spelthorne, I looked at a very big map of the constituency—hon. Members will be very surprised to learn that I used to be in the Army, and there used to be a very good saying in the Army: “If you don’t know what’s going on, get a bigger map”—and I identified four enormous blocks of blue. That was half of London’s drinking water in four raised reservoirs. Being a practical man, I thought to myself, “Well, there aren’t many votes in there.” I also thought to myself that we cannot really build many homes there.

I did further research and it turns out that in 2016, on the Queen Elizabeth reservoir in a neighbouring constituency, a large technology demonstrator for floating solar was laid down, and ever since it has produced 6.3 MW of power—enough to power about 2,000 homes. That was at the time the largest one in Europe; back in 2016, we were leading. I looked into the situation further in order to see whether we were world-leading, but it turns out that we were not particularly, and that floating solar has been deployed to a greater extent in China, India, Vietnam and Israel. We will come in due course to the benefits of floating solar as an alternative to land-based systems.

I want now to return to the more national context. Frequently, we are led to believe that alternative sources of energy can be something of a zero-sum game—when someone takes one step forward, someone else has to take one step backwards. As I am sure we will hear, in large parts of the United Kingdom there are proposed large, land-based solar farms, frequently on very good agricultural land, so the zero-sum game between food security and energy security needs unpicking.

I congratulate the hon. Member on bringing forward a debate on this massive issue. Is he aware that there are roughly 600,000 acres of unused, south-facing industrial rooftops in the United Kingdom that could be utilised before we industrialise the countryside? The Government must look at those in order to utilise already built heritage and leave our countryside as it is to produce the food that we need.

I am very grateful to the hon. Gentleman for making that point. I hope other Members will come forward with their own preferred alternatives to land-based systems, because there are others.

My hon. Friend is making a characteristically brilliant speech—the jokes get better each time we hear them. Does he agree that there are other types of provision? My area of interest is space-based solar power provision, which could provide the same sorts of solutions without taking up precious agricultural land.

As the Parliamentary Private Secretary to the shadow Secretary of State for Science, Innovation and Technology, my hon. Friend is only too well placed to talk about that. As his Whip, I can only say that his jokes get better too.

On the point that my hon. Friend the Member for Bromley and Biggin Hill (Peter Fortune) made, I can say that when I was the Minister for Space, I strongly supported space solar, which is a genuinely exciting British breakthrough.

My hon. Friend the Member for Spelthorne (Lincoln Jopp) is making a really important point about food security. As the chair of the all-party parliamentary group on science and technology in agriculture, I know that we are hugely vulnerable to the geopolitics of the strait of Hormuz and global supply chains more broadly, so we need to do more to support UK agricultural production. In my patch, we have an 8,000-acre solar farm on farmland, which will see good, productive land taken out. This Friday, I am chairing the Central Norfolk Solar Factory Farm Alliance. We are very keen to see solar on reservoirs, motorways, council buildings—on any surfaces we can—but not on good farmland.

And there we see the battle. Without wishing to get into other controversial areas, it is a little like proposals to build on green belt. If everything else were built on first and we protected the green belt, we would be a richer country.

South Derbyshire has two grid connections and gets a plethora of applications for solar and battery energy storage systems—it is the bane of my life. I am passionate about moving to renewables. I have just got an electric car, and it is helping me keep my energy costs down for the journeys that I need to make, particularly in the light of what is happening with Iran.

I am grateful to the hon. Member for securing this debate on alternatives, but does he agree that it is not quite as straightforward as we think? We need to do this quite speedily. People assume that putting solar panels on industrial sites is easy, but we still need to be able to connect them to the grid, which is being upgraded in my neck of the woods. Does he agree that, much as we desperately want alternatives, there is not a sliver bullet to get us there?

The hon. Lady makes a really important point. One of the massive delays in deploying solar power is the requirement to achieve planning permission, and I am so pleased that she has brought that up. One of the beauties of floating solar is that if the owner of the reservoir or former quarry will use the electricity themselves, there is no requirement for planning permission. In terms of speed to deployment, return on investment and speed to profit, this is to a certain extent an answer to a maiden’s prayer.

We have not yet added in the third element of this battle between food security and energy security: water security. I believe in climate change. I am more sceptical about carbon neutrality within a certain arbitrary timeline, but the fact is that evaporation is a massive issue as the world warms up. One of the stunning and much less vaunted benefits of floating solar is that it reduces evaporation by 70%. Australia is very expensively covering reservoirs in anti-evaporation covers, but those could be floating solar panels.

I can sense the mood of the Chamber—hon. Members are very keen for me to list the other benefits, so I will do just that. The first, which we have talked about, is that floating solar comes with none of the opportunity costs of putting solar panels on grade A agricultural land, so we can move the debate on from whether we have to choose between energy security and food security.

Secondly, because of the effect on evaporation, floating solar also moves the debate on from the need for water security and energy security. Another stunning benefit is that it is twice as efficient as land-based systems. We would need only half the amount of floating solar as we would need solar covering Lincolnshire or Suffolk agricultural land. Hon. Members who remember their O-level physics will know that the evaporative effect on the underside of the floating solar panel makes it self-cooling, whereas land-based and roof-based systems and those in railway sidings simply get hotter through the working day and become less efficient.

It is a pleasure to serve under your chairship, Mr Stringer. I thank the hon. and gallant Member for Spelthorne (Lincoln Jopp) for securing this important debate. I have heard the statistic that for all the land allocations that have been set aside for housing, for growing food and for renewable energy projects, and for all the other demands on the scarce land mass that we have at our disposal on this small and increasingly crowded island, we would need another two Waleses. Clearly, they are not making land any more, so how can we get better use out of the square mileage that we have at our disposal?

Ground-mounted solar gives a single purpose to land. Yes, it possibly gives some biodiversity gain; yes, it is maybe possible to graze sheep around solar panels, although I have yet to see it in reality; but generally it is a single purpose for that piece of land. How can we make better use of our land? As the hon. and gallant Member for Spelthorne suggested, we can put solar panels on reservoirs and on rooftops. I know that my hon. Friend the Member for West Dorset (Edward Morello) will point out that that is a much more expensive way of installing solar panels—we have had that conversation before—but I would like to ask where the profits go. A 2,000-acre solar farm, Lime Down, is planned for my constituency. It is 100% owned by Macquarie. Hon. Members might be aware that Macquarie was the owner of Thames Water during the time that that company was loaded up with debt. It is a financial institution, not a utility-owning institution, so the profits from the solar farm will not go to local people; they will go to Australia.

What does good look like, if we are to meet our large and increasing energy needs while also bringing the public along on our journey towards net zero? It is important to the project that there be public support, not public alienation. Smaller-scale schemes can and do work. In my constituency there are successful schemes in Long Newnton and Corston. The principles are clear: projects that are community-led are more likely to have community buy-in, as are those that are modest in scale, that are sensitively sited and that deliver direct local benefits.

It is a pleasure to serve under your chairmanship, Mr Stringer. We are focusing on the concept of floating solar, which I am entirely behind. One of the drivers for that is the proposal in my constituency for the Green Hill solar farm, which will be enormous. It will be 1,200 hectares of agricultural land: the size—my hon. and gallant Friend the Member for Spelthorne (Lincoln Jopp) will like this reference—of Heathrow airport. It will be dispersed over nine sites, require 31 km of different cabling, and use up 65% of best and most versatile land. The Government say that food security is national security, but such a scheme flies in the face of that message. Even the national policy framework EN-1 says that we must minimise the impact on BMV, yet such a scheme is going before the Secretary of State in the next few months. I really hope that he considers that, because this is not the best way to be utilising our land.

Green Hill solar farm will also have a battery energy storage system, which will be installed right outside a village called Grendon. Grendon already has a 50 MW battery storage site, and another 50 have been approved by the Reform council—I am surprised about that, given its view on battery energy storage, but there we are. However, this solar farm will require a further 500 MW on top. That will be 600 MW of storage outside a beautiful country village. It is completely inappropriate for the size. The developers have probably cited the existing source as their reason. However, this addition will completely change the nature of the villages, and we still have not been able to get an answer to the question, if there is a fire and there is a risk of thermal runaway, what that will mean for the nearby villages? I have been told that they can simply evacuate a village; that is not practical, it is not pragmatic and it does not give our residents any confidence in the scheme that is going forward.

The beauty of floating solar, as my hon. Friend said, is that there will be no land use change, which is one of the most important parts of this. It is also important that there will be no evaporation of the water, which is excellent. One of the objections is the visual impact of solar. The national policy framework EN-1 says that we have to take account of the heritage of an area. This particular solar farm will be around a series of beautiful English countryside villages with rolling hills. The village of Easton Maudit will be surrounded by solar on three sides. That will completely change the nature and experience of the village. Indeed, Sir Christopher Yelverton, a former Speaker of the House—albeit from the 16th century —is buried in one of the fine churches there; I imagine that he would not be delighted by the prospect of this coming on board. There is an important relationship between maintaining the heritage of our areas and the environment that we are in.

My hon. Friend is exactly right, and I share her frustration. In my constituency, there is a large area of protected national landscape, the North Wessex downs national park, which is constantly under threat from these kinds of proposals. Does she share my frustration at the lack of imagination shown in the UK? The A303 and the A34 run through my constituency, and there are tens of miles of embankment that could be used for solar panels. That is the approach they take in Germany, the Netherlands and elsewhere, but we never seem to get over the imagination gap about where we could put these things—floating or whatever—that may not be quite so damaging and intrusive. She probably has parts of the M1 in her constituency, which has endless miles of embankment that could be used for solar panels that could power her constituency and mine without harming any visual amenity whatsoever.

I entirely agree, and we have been trying to promote that argument. It has unfortunately been claimed that Northamptonshire could become the warehousing capital of the UK, but we should be using the roadsides. We sometimes see airports using the side banks for solar panels. Solar panels should be installed on the covers of petrol stations and on the roofs of warehouses. I know that the last Government were consulting on whether more warehouse space could be used. I know that some people make technical arguments that the roofs are not strong enough and cannot be reinforced, but that is absolute nonsense. We can definitely work to ensure that the roofs are sturdy enough for solar panels.

There is debate about whether it should be the landlord or the tenant who bears the cost of the initial outlay, and about who gets the benefit. All those things are completely surmountable, and we should be able to work on a programme for that going forward. It all goes back to planning, because meaningful requirements could enable solar power generation. I am often concerned that these initiatives end up just being greenwashing and that we are only putting them in place to be able to tick a box. What we want to see is these schemes being meaningfully integrated.

My hon. Friend is making a great speech about the importance of thinking about things strategically. Does she agree that if one was thinking about the strategic placement of ground-mounted solar, one would not put it on the best and most versatile farmland that we have for food security?

Absolutely. It certainly should not be put there, and the national planning policy framework states we should not be doing that. I therefore find it quite extraordinary that we are still having debates on this issue. There are certainly other alternatives, and they must be explored, so I really do hope that the Government take this issue seriously as it progresses over the years.