UK Electricity Prices

Lord Frost Excerpts

Thursday 4th June 2026 Grand Committee

[Lord Frost (Non-Afl)]

My Lords, it is a pleasure to follow the noble Lord, Lord Lilley, but also a problem, as he has said almost everything that needs to be said on this subject already, and in a style that few of us can imitate.

In the time available, I want to critique one particular argument that we hear quite a lot nowadays: that we just need energy abundance. The argument runs: “We just need more of everything—nuclear, gas, wind and solar. Let’s just get building—it doesn’t really matter what. Let’s just get on with it”. In a way, it is a good thing that we hear this argument. I think it is put forward precisely because people sense that there is something awry with the arguments for renewables but do not want to follow the logic through to its conclusion. Indeed, the argument sounds superficially logical: let us maximise our ability to use everything—the wind is free, so let us use that when we can, and use other things when we cannot. It is said that building lots of everything makes sure we can do that.

There are two problems with this. The first is the best-known one: intermittency. You cannot control when the wind blows, so you have to have enough capacity to replace all your renewables capacity when there is zero wind and zero sun. The more renewables you have on the system, the more back-up you need and the bigger your problem is. Having more renewables requires even more capacity overall, and that brings more cost.

The second problem is perhaps less intuitively obvious but still crucial. It does not matter that the marginal cost of wind is free; it still needs a system to deliver it. After all, rain is free, but we still pay for our water because we need a system to get it to us. It is the nature of this system, and the cost that goes with it, that is the problem. Renewables are a low-density inefficient system; they require a grid that is fundamentally different in nature to the grid that conventional generation needs. It is much more diffuse, much less efficient and much more difficult to get the power to where it is needed, even when it is being generated.

To illustrate the point briefly, compare Hinkley Point to same electricity generated via wind. Hinkley Point C will generate 7% to 10% of the country’s electricity demand on a site roughly the size of Regent’s Park—reliably, all day and all night. To generate the same amount with renewables requires an area half the size of a county such as Nottinghamshire or Leicestershire. In practice, of course, it is much more spread out and much greedier in terms of land use than that.

Such a diffuse and intermittent system requires extra engineering to provide capacities that come automatically with a conventional grid: inertia, voltage support and system strength. All this comes with cost: grid balancing, vast transmission costs, curtailment and, as the noble Lord, Lord Lilley, said, subsidy and price support. Optimising a grid to do these things is difficult and expensive—that is just the physical reality of these things.

This is why “just build more of everything” is a fallacy. You cannot lower electricity prices by adding more of the very technology that increases the costs. “More of everything” just multiplies the most expensive and complicated part of the overall bill. That is why “build more of everything” is not a strategy; it is a refusal to be intellectually honest and a reluctance to face up to what is necessary if we are to get costs and prices down. What is necessary is not layering renewables on top of gas or nuclear but halting renewables expansion altogether, before any more damage is done.