5.45pm
My Lords, I rise on the final note of the contribution of the noble Earl, Lord Russell, on those amendments to speak to my Amendment 91, which he just mentioned. It is in my name and that of my noble friend Lady Finlay of Llandaff and the noble Lords, Lord Storey and Lord Woodley. I know it enjoys support from all parts of your Lordships’ House. It would insert the following new clause after Clause 7:
“Within six months of a designation under section 1(1) coming into effect, Great British Energy must publish an assessment of the potential use of tidal barrage projects to support decarbonisation of the energy sector”.
That sits comfortably with the other amendments in this group. I strongly support what the noble Lord, Lord Naseby, said about the use of hydrogen, what the noble Earl, Lord Russell, said about heat pumps, and what I think my noble friend Lady Boycott will say about biomass.
I also thank the Minister, the noble Lord, Lord Hunt, with whom I have already had one meeting—he promised that at Second Reading and I am grateful to him for it. It is partly about whether we can reduce reliance on forms of energy that come with a price tag connected to slave labour in places such as Xinjiang. If one is to stop using sources that have a human rights dimension, we have to find alternatives. In a way, that is what these amendments seek to do: to look at what some of the other alternatives may be. I also know that the Minister has kindly agreed to meet with me and the metro mayor for Merseyside, Steve Rotheram, along with his noble friend, the noble Lord, Lord Woodley, in due course, so we can talk further about the Mersey barrage, which I will come back to in the course of my remarks.
The noble Lord, Lord Naseby, talked about security and diversity—very important concepts that have come out in all the previous groups we have talked about. We should make sure that we are not so dependent on any one source that anyone else can then hold us to ransom. I would add to security and diversity the need for more reliance in the United Kingdom on ourselves and a reduction in dependency on countries such as the People’s Republic of China or Russia. I think all of us were horrified to see the dependency that Germany had at the beginning of the war in Ukraine, and we must learn the lessons of that.
Why tidal energy? I am grateful to the House of Lords Library for producing some notes on this for me. However, I have been interested in this issue since the 1980s, when I served in another place on the Environment Select Committee, but also because I founded the Mersey Barrage All-Party Parliamentary Group. This idea had not come out of the blue. In fact, tidal barrages have been around for many years. The first was thought of by the French in 1921. It did not come to pass until 1966, when the La Rance barrage, quite close to Saint-Malo in Brittany, opened.
So this is not a fantasy or something out of dystopian fiction; they have been done and here are decades of experience.
Tidal energy could be a crucial pillar for delivering the objectives of the energy Bill. It would strengthen the UK’s renewable energy mix, complement intermittent sources such as wind and solar, drive the green industrial strategy by fostering innovation, create jobs and support regional economic growth. The United Kingdom is uniquely positioned to be a global leader in tidal energy.
We can learn from projects such as the La Rance estuary barrage in France, but we can also learn—I think the noble Lord, Lord Howell, will be particularly interested in this—from the experience of South Korea, where the largest operating tidal power station is based: the Sihwa Lake project, which produces 254 megawatts of energy. It is a 43.8 kilometre artificial lake constructed as a land reclamation project in 1994. It used a 12.7 kilometre seawall at Gyeonggi Bay and, after some false starts, if you look at its history, nevertheless, construction led to 552.7 gigawatts of electricity generated by the tides. I asked what that really means to a layman like me, and I was told that it is the equivalent of 862,000 barrels of oil, or 315,000 tonnes of CO2, equivalent to the amount produced by 100,000 cars annually. It has 10 water turbine generators, enough to support the domestic needs of a city with a population of about half a million. After some false starts initially, as I said, it led to some very positive developments in the ecosystem there as well.
That neatly takes me to the Mersey barrage, an idea that, as I said, has been around for over 30 years now. There has recently been a new public consultation, which closed last month. I know that when the Metro mayor comes to meet the noble Lord, Lord Hunt of Kings Heath, there will be an opportunity to discuss the findings of that.
None of these things, whatever energy we produce, comes with no downside—we all accept that—but there are surprisingly few downsides to the use of tidal barrages. Merseyside would argue that the green industrial revolution could be started off there, and Britain’s renewable energy coast could be there, on the River Mersey and in the Irish Sea. It would power hundreds of thousands of homes and create many jobs. I visited Cammell Laird a few weeks ago to see the wonderful renaissance that has taken place there, alongside the extraordinary renaissance of the Port of Liverpool; these are big success stories that need to be understood and learned more widely. Listen to what the mayor himself says: “There is a strong strategic case for taking forward a Mersey tidal power project and we are developing detailed plans for how it could be made a reality. I also believe there is a strong moral case for it too—our planet’s future depends on it.”
As people such as the noble Lord, Lord West, will confirm, the Mersey has a huge tidal range—green energy to power every home in the city region for more than 100 years. Surely that is something worth giving serious consideration to. It is predictable, so it complements offshore wind and solar energy; but it is predictable in a way that they are not always. It should be a key part of the diversity that we heard about earlier. It is a well-established technology with minimal decommissioning needs. I would also point the Minister to other experience, not just overseas. The Orbital O2 project in Orkney is the world’s most powerful underwater turbine: 2,000 homes there receive their energy from it, and more than 2,200 tonnes of carbon are cancelled as a result of the work of the project.
Then, of course, there is the Severn barrage project, which has been around a long time and has had many advocates, not least on the Official Opposition Benches over the years. I know that some noble Lords, one of whom cannot be here today, are great supporters of it, as are some of my noble friends. This is an issue that has captivated the party of the noble Lord, Lord Wigley, who is in his place, and others. The idea was dropped back in 2010, but it was resurrected in 2024, with New Civil Engineer reporting that a new independent commission had been established. It estimates that 7% of the United Kingdom’s electricity could be generated, and challenges such as cost, risk and environmental impacts, which have previously halted major barrage projects, are believed to be capable of being overcome by the use of new technologies.
The UK could be in a position to be a global leader. I certainly think this is worthy of exploration, and that is all the amendment commits us to doing. This should not be seen as some sort of science fiction, as some projects undoubtedly appear to be from time to time. It is not unrealistic, and there are already very good examples, which I have cited. It is worth looking at further, and if the Minister cannot support the amendment, I hope he feels that the principle of delving further into the potential of barrages should be part of what Great British Energy seeks to achieve.
Mersey.
La Rance
Orbital: Orkney
My Lords, I do not believe that the Bill should be too specific on the investment targets of GBE. As I said in an earlier group, I believe that GBE should remain flexible and fleet of foot, adapting itself over the years to the development of science and changes in the marketplace.
Nevertheless, there is no harm in us discussing where we think some of the current opportunities lie. In that context, and in the context of the amendments in this group, I will touch on both heat pumps and tidal energy. Unfortunately, it was not clear from reading the script that the amendments from the noble Lord, Lord Naseby, referred to hydrogen. Had I known this, I would definitely have been supporting his amendments, because I am very keen on hydrogen. It has a crucial part to play in our energy infrastructure, as a storage of intermittent power—as the noble Lord himself mentioned—as well as in the making of steel and in transport. Hydrogen fuel cell cars have a range of more than 1,000 miles. Hydrogen is a really important part of our infrastructure. As I said at Second Reading, I hope that GBE will support the hydrogen industry.
I turn now to heat pumps. Heating and hot water make up around 40% of the UK’s energy consumption and nearly one-third of our greenhouse gas emissions. I see a role for GBE not so much in individual domestic heat pumps but in community heat pumps—particularly where, to coin a phrase, we can use the heat under our feet. Many major population centres in the UK are above, or adjacent to, hot, sedimentary aquifers at, say, 500 to 2,000 metres depth, with temperatures ranging from 25 to 60 degrees and higher. These, combined with an at-scale community heat pump, have huge potential to produce heat for hundreds of thousands of homes, factories, hospitals and greenhouses. In Holland, they hope to meet 23% of their heat demand by 2050 using geothermal heat.
We have geothermal resources in the UK; we have the heat beneath our feet. We also have the drilling skills left over from oil and gas explorations to use in this nascent industry. The industry is poised to deliver growth, renewable heat and employment. It just needs a small amount of government focus and pump priming.
I turn to tidal energy and the amendment tabled by the noble Lord, Lord Alton. I strongly believe that it is imperative for the UK to play to its strengths in the whole energy field. One of its real strengths is its range of tides. While in Gibraltar, for instance, the tidal range is only about one metre, in the Solway Firth it can be eight metres or, in the Bristol Channel, 15 metres- plus. We also have tidal races around our shores and between our islands which flow at great speed and with considerable power.
Of course, tidal power is classed as intermittent, but it is guaranteed and predictable. We know now how much power we can produce from a given site between the hours of 6 pm and 7 pm on today’s date in 2124 because, if we build, say, a tidal lagoon now, we know it will still be producing electricity almost for free in more than 100 years’ time.
We have tidal races in our firths and between our islands but, to me, the most compelling solution for harnessing our tidal power are large, offshore tidal lagoons. Any site with a depth of between five and 10 metres, and a tidal range in excess of five metres, can produce guaranteed power. They are better than a barrage across a bay because you can have turbines all round, not just on one side. This means they are almost half the price per output of power. They can be any shape, with curves in any direction that can follow the required underwater contours to produce maximum return on investment. There are about 20 ideal sites around the UK coastline.
I come from southern England, as compared to the noble Lord, Lord Alton, and the other side of the channel from the noble Lord, Lord Wigley. If noble Lords look up, they might be able to imagine a wall of water the height of this Chamber and several miles long. This is the sort of power that the Severn Estuary can produce four times a day. One lagoon in Bridgwater Bay alone—right next door to Hinkley Point, with its connections to the grid—could produce 1,900 megawatts. These lagoons do not have to be shut down for repairs. If a turbine—one of 20 or 30—needs servicing, it is lifted out for maintenance, while the rest just keep on turning.
As opposed to a barrage across an estuary, these lagoons do not upset shipping traffic in any serious way, because they sit at the side of shipping channels in the shallow waters. Furthermore, their environmental effect makes only peripheral difference to the course of the tide, migratory fish, wading birds and so on. They have the support of most environmental NGOs. There are numerous sites for these lagoons, from the north to the south of the UK. There is a seven-hour tidal difference between Bristol and Solway. If the tides are used on both flood and ebb, this gives an almost consistent baseload of power for England—and that is before we tap into some of the Scottish tidal ranges. Tidal lagoons as a whole could provide three times the capacity of Hinkley Point. We must play to our strengths. Tidal power is our natural advantage and I believe it would be well worth the focus of GBE.
6.15pm
My Lords, I apologise for coming in late. I am here at the behest of the noble Baroness, Lady Finlay, who apologises to the Committee that she cannot be here to speak in support of Amendment 91, proposed by the noble Lord, Lord Alton. I very much support the points that he made.
The noble Baroness has asked me to make a brief contribution to the debate. I wholeheartedly agree with the points she has asked me to raise. These relate mainly to the importance of tidal power in both its devices, which we heard analysed a moment ago. Tidal range is one part of the possibility of creating tidal power; tidal stream is the other. Tidal stream has not
yet been well developed and that could be something for the future, but tidal range most certainly has been. There is a predictability about it which gives it a tremendous advantage.
Tidal range devices use water height. The differential between high and low levels in the Severn, for example, is an enormously important factor. Using the same principles, there are locations suitable for lagoons as well—certainly around the coastline of Wales, in Swansea Bay and up around Anglesey. I understand that the Marine Energy Council recommends reaching a gigawatt of tidal stream capacity by 2035. This would be an enormous contribution.
The noble Lord, Lord Alton, spoke about the possibility that 7% of the UK’s electricity needs could come from the Severn Barrage. That would have the advantage of providing very important construction work, which could make a massive contribution to the south-east Wales economy. Given what has happened recently to the steelworks in Port Talbot, those jobs are very much needed. I hope that the Government will look seriously at this.
The case for this type of electricity generation is overwhelming. I hope the Government will give it the attention it deserves.
The Minister: Lord Hunt of Kings Heath:
(Lab)
The noble Lord, Lord Alton, spoke eloquently and passionately to Amendment 91 on tidal barrages. I listened to the noble Lord, Lord Cameron, too, who suggested that tidal barrage and, in particular, lagoons play to the UK’s strength. The noble Lord, Lord Wigley, also spoke. The National Energy System Operator—NESO—is leading a network innovation allowance project aimed at establishing a holistic knowledge base on the potential development and impacts of tidal barrage in Great Britain within the context of grid operability. That is a very important development that I hope picks up the point that noble Lords have raised—the situation may have changed over the past 10 or 20 years.
I look forward to discussing the Mersey barrage with the noble Lord, Lord Alton. When I did this job at the Department of Energy and Climate Change from 2008 to 2010, I chaired a forum that we established on the Severn estuary potential, so I would certainly be interested in taking discussions forward on the Mersey barrage.
I hope that I have reassured most noble Lords that the energy technologies they wish to see supported can be covered in the Bill, but Great British Energy must be allowed to make its own decisions within the context of the objectives and strategic priorities the Secretary of State will set.
