Energy Grid Resilience

Andrew Bowie Excerpts

Wednesday 30th April 2025 Commons Chamber

[Andrew Bowie (West Aberdeenshire and Kincardine) (Con)]

I thank the Minister for advance sight of his statement, and echo his comments; of course, the Conservatives’ thoughts are with all those affected by the blackouts in Spain, Portugal and more widely.

The Minister rightly addresses concerns about the security of our grid in the context of the shutdown witnessed on the Iberian peninsula, and I am glad that he can confirm that he is carrying on implementing the recommendations from Exercise Mighty Oak, in which I was involved, on the action that would be required if such an event took place in GB. The primary responsibility of the Minister’s Department is to keep the lights on in this country. The images from Spain and Portugal are a sombre reminder of what happens when the grid fails. Extended blackouts are devastating, and it is a relief that power was restored to 99% of customers by 6 o’clock yesterday morning. The grid collapse in Iberia has demonstrated the fragility of the complex, interconnected systems that support modern life, and the very real impacts on human life of such a collapse.

It is the Minister’s responsibility to ensure that the same thing does not happen in Great Britain, as the price for our economy and for communities across this country would be catastrophic. We cannot get away from the fact that this Government’s plans to rush ahead to build a grid that is entirely dependent on the wind and the sun in just five years’ time will make our electricity grid significantly less reliable.

The stability of our electricity grid depends on what is called inertia, which is the ability for the system to resist destabilising fluctuations in frequency. It is the reason our grid has been so secure and resilient over the decades the Minister references. This inertia is provided by turbines, like those found in nuclear, hydro or, crucially, gas power stations, but it is not provided by solar or wind farms. If the grid does not have enough inertia to resist sudden changes in frequency, it can become destabilised, and cascading grid failure can occur. That means blackouts. As the Spanish NESO said in its latest annual report, the closure of conventional generation plants, such as coal, gas and nuclear, has reduced the firm power and balancing capacities of its grid, as well as its strength and inertia. This has also happened here in Great Britain. Data from NESO shows that the inertia in our grid has been steadily decreasing over time, as gas and coal have come off the system, to be replaced by wind and solar. This comes with a hefty price tag, which is the problem with so much of the Labour Government’s approach to energy security. Their imposed targets are saddling the British people with mountains of extra costs, as the Government rush ahead towards a power system that depends on the weather, rather than on firm, reliable baseload.

Tens of billions of pounds are spent subsidising wind farms, expanding the grid, and providing back-up from reliable gas plants. The Government set their 2030 target, and now they are trying to work out how they can achieve it, but they refuse to be honest with the British people. They refuse to do an open and honest assessment of the costs and risks that come with this approach. It is no wonder that even Tony Blair has said that the present policy solutions are inadequate and doomed to fail.

The Conservatives believe in a system that delivers secure, affordable and clean energy for the UK. A cyber-attack has been ruled out by the Spanish Government as a cause of their grid collapse, but we know that the threat of interference from hostile states is constant. Will the Minister update the House on the action he is taking to protect the grid from hostile activity? When will he finally tell us which single Minister is responsible for the safety and security of our offshore energy infrastructure?

The lessons from the incident on the Iberian Peninsula are abundantly clear. We must retain inertia in our grid to keep it stable and resilient. Nuclear power provides vital baseload power generation, along with inertia, which would have helped to mitigate a cascading failure like the one earlier this week. Will the Minister give the nuclear industry the certainty that it is asking for, and commit to 24 GW of nuclear power, as the previous Government did? Will he ask NESO to provide this House with a full, transparent update on the role of inertia in our power system, on the consequences of declining inertia, on the impact that has on grid stability, and on the costs associated with it?

Finally, the Minister has said that Great Britain has never experienced a complete shutdown such as that seen on the continent. What assurances can he offer this House that work is being undertaken, so that NESO and the National Grid are prepared for a black start, if ever that is needed?

[Michael Shanks]

I shall start with the more serious of the hon. Gentleman’s questions, and then, in reply to some of his other questions, I might gently remind him who was in office not that long ago. On a serious note, I agree entirely with him on his opening point: the first priority of my Department and the Government is to ensure our energy security. The past few days in Spain and Portugal have brought to light just how much of our day-to-day lives are dependent on a functioning electricity system, so he is right to make that point, and we are very aware of it.

I am surprised that the hon. Gentleman did not recognise the work that the previous Government did on building the renewable system, and on introducing inertia into the system, because that all started a number of years ago. We have a resilient grid in this country, and it is important to continue to have that. That means building new grid infrastructure, which he and a number of his colleagues quite often oppose. It is important to build that grid infrastructure and to invest in it. We will continue to work with NESO and others to understand the full causes of this outage. I will not be drawn into speculation on what may have caused it, because clearly the first priority of the Spanish and Portuguese Governments has been restoring power, but they will carry out investigations to find out the cause, and we will implement any lessons from that.

Finally, the hon. Gentleman was right to reflect on Operation Mighty Oak, which was carried out under the previous Government. We have been taking forward those recommendations right across government. My right hon. Friend the Chancellor of the Duchy of Lancaster is looking at resilience across Government. These are all important points. However, I say gently that energy security is an absolute priority for this Government, which means building the energy infrastructure that this country needs, and not opposing it at every turn.

--- Later in debate ---

[Michael Shanks]

I have to apologise to the former Prime Minister, but I have been a little busy over the last few days and have not read all of his report.

[Andrew Bowie]

Not even the foreword!

[Michael Shanks]

Indeed. I apologise and will prioritise it for my weekend reading. What I did see is that the Tony Blair Institute outlined very clearly its support for clean power as an important transition for this country. The shadow Minister earlier said that this was all about wind and solar, but that has never been the position for this transition. Nuclear will play a critical role, as will carbon capture, usage and storage as well as hydrogen. All of that was outlined in Tony Blair’s report.