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.