Great British Energy Bill

Debate between Lord Reay and Lord Offord of Garvel

Committee stage
Monday 13th January 2025 Lords Chamber

[Lord Reay (Con)]

My Lords, I will speak to Amendment 131 tabled by my noble friend Lord Lilley, to which I have added my name. It would require GB Energy to publish a report on the projected costs of long-duration energy storage. I regret that I was unable to speak at Second Reading, for which I apologise.

This is an ambitious Bill that is part of an ambitious policy. It is a policy that is fundamental to a frighteningly large part of our lives: the availability of energy, the dependability of energy supply and the cost of energy. According to whether Governments succeed or fail in these areas, economies sink or swim, and functions slide into dreary and dangerous dysfunctionality. They bloom like an English country garden in midsummer or wither, shrivel and slumber like any garden anywhere on these islands in coldest, darkest, most forbidding winter.

Energy is a policy area to which the precautionary principle should clearly apply. It is not an area where we should make a habit of leaping about in the dark or buying pig after pig in poke after poke or moving forward, fingers crossed, on a wing and a prayer.

It is the very opposite of such an area. It is a subject on which clear-sighted, far-sighted sceptics, expert sceptics, industry sceptics, and seriously sceptical scientists and engineers with the national interest at heart deserve a hearing. The stakes are just too great—the Bill is well named—for turning a deaf ear or blind eye in their direction, as indeed we were forcibly reminded last week. Last Monday, the Secretary of State for Energy was bragging that wind power was the UK’s biggest source of electricity in 2024. He said that it was

“a huge moment on our journey away from energy insecurity”.

Less than two days later, NESO issued a warning that there was a close to 30% chance of power cuts that very evening.

Although the operator managed to eliminate this risk by sourcing back-up power, this came at vast expense, as my noble friend Lord Fuller pointed out, with prices rising to a staggering £5,500 per megawatt hour, around 80 times the average price in 2024—the highest energy prices in Europe. These are costs that the consumer and business in this country must bear, and part of the reason why our energy costs are as high as they are. Our industrial energy costs are four times those in the United States and 46% above the IEA median. The Government’s policy of net zero at any cost will serve only to make this dire situation worse.

As many of us know, the operator last week came very close to disaster, with only 580 megawatts of headroom. This is equivalent to less than a single power station cutting out and, just three hours after the peak, two power stations with a combined capacity of two gigawatts did indeed trip out, exhibiting how close we came to the lights going out. This near-miss should be a wake-up call to this Government and a signal that we need to change course. It should be, but will it be? I confess that I am not holding my breath. As things stand, the Government’s policy to pursue intermittent wind and solar and to neglect baseload power such as gas and nuclear in all likelihood will cause the country to run into severe problems in the future and, as we have seen, power cuts could happen any week.

The Government believe that long-duration energy storage will be able to balance energy supply and demand over time. This early-stage technology, driven by hydrogen, will potentially allow storage of energy from renewables over extended periods of time up to months and years. Battery storage, on the other hand, at present only has the ability to store energy in a small capacity for a mere two hours.

In a debate on the Science and Technology Committee’s report on long-duration storage, held on Thursday in this Chamber, the newly appointed Minister for Investment, the noble Baroness, Lady Gustafsson, stated that

“we are going to need colossal amounts of hydrogen storage”.—[Official Report, 9/1/25; col. 845.]

What this equates to are colossal subsidies at colossal expense to taxpayers—a cost that the Government are currently showing no sign of wishing to calculate.

In theory, wind plus green hydrogen appears to be a sensible idea that uses the output of wind farms when not required for the grid to generate green hydrogen, which then gets converted into electricity. The document that underpins the Government’s promotion of long-duration energy storage is, as my noble friend Lord Lilley pointed out, the Royal Society report produced in 2023. The report estimates that, by 2050, public and private costs required to establish long-duration energy storage in the UK will be £100 billion for actual storage, £100 billion to increase associated grid capacity and £210 billion for the wind and solar capacity required.

Unfortunately, there are multiple issues with the report in terms of its costings and assumptions. The report is based on unfeasibly low costs for hydrogen electrolysers, storage and generation. It assumes no leakage of hydrogen stored underground at high pressure for up to a decade. The return on capital assumption posits that investors will be attracted by a 5% return, but a return of two to three times that would be required in today’s marketplace to invest in a risky, early-stage technology such as this.

This is even without the recent sharp increase in gilt bond yields, with the cost of borrowing rising to the highest level for nearly 30 years, which is making every equity investment more expensive. These costings were produced before the surge of inflation a couple of years ago, which means that they are too optimistic. Even if the costs are achievable by 2050, the infrastructure will need to be built using today’s cost base, which will push up the cost base dramatically.

Substantial hydrogen electrolyser capacity will be required, which will need thousands of engineers that the UK does not possess. Perhaps the Minister could tell us where all these engineers will come from, particularly as there is strong international competition for this capacity from the EU and the US, which have significant hydrogen subsidies.

Even after the construction of a long-duration energy storage system, with its vast cost, the overall grid is likely to remain unreliable. The large storage caverns proposed by the Royal Society will take 10 years to fill and could empty in 12 months of extremely low wind. What happens if you have more than one year of very low wind over the 10-year period it takes to restock the storage caverns? Further questions surrounding the viability of this technology include the possible negative reaction of residents to having large caverns of hydrogen situated beneath their homes. The Government’s pronouncements suggest that they will plough ahead with granting subsidies to energy storage developers without having conducted adequate research on this issue.

At the same time that a calamity has narrowly been averted in the energy markets, we are experiencing a developing crisis in the financial markets. It has become apparent to market participants that the Government’s high-tax, high-borrowing Budget has markedly reduced any chance of growth. With the cost of borrowing rising dramatically, the Government’s spending plans are spreading alarm among investors, including the blank cheque written in respect of their uncosted ideological pursuit of net zero.

With expenditure on renewable subsidies now amounting to £11 billion a year, with an additional £2.5 billion for grid balancing and another £1 billion per year for the capacity market, the UK’s industrial and consumer electricity prices have become among the most expensive in the world. This will only get worse with the Government’s commitment of over £110 billion to connect remote wind farms to the grid.

Given the current economic and financial climate, it is more imperative than ever that the Government produce a report and come clean on the costs involved for the taxpayer of their plans for long-duration energy storage. We need an energy policy in which we can have confidence, and that means that, as an absolute minimum, we need more information, clarity and realism.

[Lord Offord of Garvel (Con)]

My Lords, I will speak in support of the amendments of my noble friend Lord Lilley. It goes without saying that long-duration energy storage is essential if the Government are to achieve the clean energy targets that will ensure that fossil fuels are phased out. To replace fossil fuel-derived energy, the Government are ramping up renewables—an entirely unreliable source. It is therefore critical that we use long-duration energy storage if we are to maintain the electricity supply.

As has been referenced by my noble friends Lord Lilley and Lord Reay, the Royal Society has estimated that a substantial volume of long-duration energy storage—enough to supply roughly a third of current annual UK generation—could ultimately be needed. It found that a strategic reserve of long-duration storage will be particularly important to address supply shortfalls from renewables in periods of low wind and rain. If the Government are to achieve a fully decarbonised electricity system by 2030, they must make provisions for substantial energy storage to manage the gaps between increased supply and demand. While Britain has just 2.8 gigawatts of long-duration energy storage capacity from four pumped hydro-plants in Scotland and Wales, it is believed that terawatt hours of long-duration electricity storage will be needed to decarbonise the grid in the whole of the UK.

The storage of power increases the flexibility of the grid and minimises likelihood of wasted renewables in cases of excess supply. Therefore, if GB Energy contributes to a large-scale rollout of long-duration energy storage, it would increase the availability of renewable power and may even lower consumer energy bills. The previous Government consulted on policy mechanisms to support low-carbon storage and introduced a target in the British Energy Security Strategy to deploy enough to balance the electricity system. We also moved to reform energy systems, establishing the future system operator, and consulted on a long-duration energy storage business. Finally, the previous Government addressed the challenging economics of long-duration energy storage projects and activity, and they consulted on introducing a cap and floor mechanism to implement additional financial support mechanisms.

Clause 3 states that GB Energy’s objects include facilitating and participating in the storage of clean energy. I therefore ask the Minister to confirm exactly how GB Energy will be involved in the storage of electricity generated from these renewable sources. It is critical as it prioritises the storage of energy to avoid the risk of blackouts, price fluctuations and our reliance on energy imported from foreign states. We cannot afford to compromise our energy security even more by failing to do so.

In conclusion, the development of long-term energy storage technology must occur alongside that of the national grid. We cannot increase our energy storage if we have no means to transmit and distribute the electricity. We face an immense but urgent challenge in scaling up our clean energy infrastructure, whether that be storage or distribution. I look to the Minister to clarify what proportion of the allocated £8.3 billion of taxpayers’ money will be invested in long-term energy storage solutions.