Energy Grid Resilience

Lord Offord of Garvel Excerpts

Tuesday 6th May 2025 Lords Chamber

[Lord Offord of Garvel (Con)]

My Lords, I begin by expressing my sympathy for all those impacted by the recent blackouts in Spain, Portugal and beyond. This blackout should serve as a stark reminder of the consequences when the power grid fails. Prolonged blackouts are devastating. The collapse of the grid in Iberia highlights the vulnerability of our complex, interconnected systems that underpin modern life, as well as the profound human impact that such failures can have. We must ensure that this does not happen in Great Britain, as the economic and social consequences would be catastrophic.

The Government’s plan to rapidly build a grid that is dependent on naturally unreliable and intermittent renewables in just five years will severely compromise the reliability of our electricity supply. The stability of a grid depends on what physicians know well as inertia—the ability to resist destabilising fluctuations in frequency. This has been a key factor in the security and resilience of our grid over the years. Inertia is provided by turbines in nuclear, hydro and gas power stations, but it is not provided by solar and wind farms. Without sufficient inertia to buffer against sudden frequency shifts, the grid risks destabilisation, potentially triggering a domino effect of system failures that culminates in widespread blackouts.

The most recent annual report from Spain’s equivalent of NESO highlights the risk of relying too heavily on renewables. It concluded that the closure of conventional power plants such as coal, gas and nuclear has diminished the grid’s balancing abilities and inertia. What is deeply concerning is that the same trend is occurring here in the UK. Data from NESO has shown a steady decrease in grid inertia as gas and coal plants are replaced by wind and solar. The transition carries a significant cost, which exemplifies the flaws in much of this Government’s accelerated energy security strategy.

The imposed targets are burdening the British public with escalating costs as the Government push forward with a power system dependent on weather conditions rather than reliable, consistent baseload energy. Billions of pounds are being spent subsidising wind farms, expanding the grid and providing backup through reliable gas plants, yet the Government remain determined to meet the accelerated 2030 clean energy target without being transparent with the public about how this will be achieved.

The lessons from the Iberian peninsula’s experience are clear. We must maintain inertia in our grid to ensure its stability and resilience. Gas and nuclear power are essential for providing reliable baseload generation and inertia. I look to the Minister to provide clarity and assurance. Can he confirm NESO’s and the national grid’s preparedness for a blackout? Will he recognise the role that inertia plays in our power system and the impacts of declining inertia on grid stability? Finally, will he recognise that it is not a reliance on, to quote him, “international gas markets” that puts the UK at risk of blackouts? That lies squarely at the foot of renewables, which cannot provide reliable baseload electricity.

[Earl Russell (LD)]

My Lords, I thank the Minister for the Statement on the power outages across the Iberian peninsula. Our thoughts are of course with the 55 million people across Spain, Portugal, Andorra and parts of France who were affected.

The Statement rightly highlights the highly resilient nature of Great Britain’s energy. I welcome that we will continue to improve our resilience and ensure that our energy systems are robust and that we have the proper exercises in place. We note that a similar event in Great Britain—a total loss of power—is listed on the national risk register as high impact but very low likelihood. It is reassuring to hear that the Minister has been in regular contact with the National Energy System Operator and is working closely with industry to maintain the resilience of our energy infrastructure.

I also welcome the Government’s taking forward recommendations from previous exercises such as Mighty Oak. As the Minister has noted, the exact reasons behind the power failure remain uncertain. We note that independent examinations are going on and that the Spanish and Portuguese Governments and the European Commission are all examining the causes.

The truth is that there are probably several interlinked events that caused this power outage. Sadly, despite the fact that the causes are at the moment unknown, a “firestorm of disinformation” has already erupted, with some attempting immediately to blame the use of renewable energy. We echo the Spanish Prime Minister’s call for caution against misinformation and disinformation. Energy experts have been quite quick to dismiss renewables as the primary cause.

On disinformation, Carbon Brief notes that UK newspapers have already launched more incorrect editorials attacking our net-zero policies in the first four months of 2025 than they did during the whole of 2024. So I take this opportunity to ask the Minister, what actions are the Government taking to improve government communications and actively counter disinformation in this area?

What this incident does highlight, however, is the critical importance of investing in and upgrading our national grid. As we transition to clean energy, a closely synchronized dance has to happen between building grid capacity and developing clean power. The grid must be designed and invested in adequately, at the right time and with the right volumes, as renewable energy is added and demand for electricity grows. Significant investments are needed: some £77 billion over the next five years to increase electricity levels.

The UK is lagging behind, with grid infrastructure spending being only 25p for every pound spent on renewables. What measures are the Government taking to make sure that investment in our grid is keeping pace and meeting the investment we require?

I also want to ask the Minister about transformers. Following the fire at Heathrow, it has come to my attention that only one factory in the UK produces these bespoke bits of kit, and there are 12 to 24-month waiting times. These are crucial for upgrading our grid and making sure it continues to work, so can the Minister have a look at the transformer capacity issue?

We must learn any lessons, but a baseless rush to blame renewables as part of a culture war helps no one at all. Enabling the resilience and security of our energy grid is paramount. We must focus on the facts, invest strategically in our infrastructure and counter harmful disinformation to deliver a secure, affordable and clean energy future.