Great Britain's grid operator pays £10m for extra power to avoid supply crunch tonight
Guardian AU Business
•Wed, 24 Jun 2026 15:33:15 GMT
📰 What Happened
Great Britain's National Energy System Operator (Neso) paid approximately £10 million on Wednesday, June 24, 2026, to secure extra electricity and avoid a supply crunch as an extreme heatwave drove up demand for air conditioning and electric fans. The system operator issued a notice late on Tuesday asking generators to provide additional capacity, and ultimately agreed to pay about £1,400 per megawatt-hour — nearly 20 times the average electricity market price from June 2025 — to secure approximately 1.7 gigawatts of imported electricity from continental Europe via interconnector cables.
Neso confirmed that the electricity supply was not at risk and that the notice did not mean a blackout was imminent. The warning was cancelled on Wednesday afternoon after the additional capacity was secured. The total cost of the balancing operation was estimated at around £10 million — more than four times the usual daily average for such operations. The incident highlights the strain that extreme weather events place on Britain's energy infrastructure, particularly during periods of high demand combined with low wind generation, which reduced the contribution from the UK's substantial wind farm capacity.
🔍 The Backstory
Great Britain's electricity system has undergone a dramatic transformation over the past decade, with renewable energy — particularly wind power — becoming the largest source of electricity generation. However, this creates vulnerabilities during periods of low wind and high demand. The UK has also significantly expanded its electricity interconnector capacity with continental Europe, allowing it to import power when domestic generation is insufficient — though this strategy depends on European neighbors also having surplus capacity. The June 2026 heatwave saw temperatures across much of England reaching record levels for the month, driving up electricity demand for cooling. The situation echoes similar events in other countries during extreme weather, including the Texas grid crisis in 2021 and European heatwave-related shortages in 2022. The carbon-intensive nature of the solution — firing up gas plants and importing power from continental grids — also highlights the tension between decarbonization goals and energy security during extreme weather events.
🎯 Why It Matters
The £10 million balancing payment — nearly 20 times normal market prices — demonstrates the extreme costs of maintaining grid stability during weather events exacerbated by climate change. As heatwaves become more frequent and intense, the UK's energy system will face increasing pressure, requiring investment in grid resilience, storage capacity, and demand-side management. The incident also underscores the importance of interconnector capacity as a critical component of energy security, while revealing its vulnerability when European neighbors face similar weather conditions simultaneously.
Great Britain's National Energy System Operator (Neso) paid approximately £10 million on Wednesday, June 24, 2026, to secure extra electricity and avoid a supply crunch as an extreme heatwave drove up demand for air conditioning and electric fans. The system operator issued a notice late on Tuesday asking generators to provide additional capacity, and ultimately agreed to pay about £1,400 per megawatt-hour — nearly 20 times the average electricity market price from June 2025 — to secure approximately 1.7 gigawatts of imported electricity from continental Europe via interconnector cables.
Neso confirmed that the electricity supply was not at risk and that the notice did not mean a blackout was imminent. The warning was cancelled on Wednesday afternoon after the additional capacity was secured. The total cost of the balancing operation was estimated at around £10 million — more than four times the usual daily average for such operations. The incident highlights the strain that extreme weather events place on Britain's energy infrastructure, particularly during periods of high demand combined with low wind generation, which reduced the contribution from the UK's substantial wind farm capacity.
Great Britain's electricity system has undergone a dramatic transformation over the past decade, with renewable energy — particularly wind power — becoming the largest source of electricity generation. However, this creates vulnerabilities during periods of low wind and high demand. The UK has also significantly expanded its electricity interconnector capacity with continental Europe, allowing it to import power when domestic generation is insufficient — though this strategy depends on European neighbors also having surplus capacity. The June 2026 heatwave saw temperatures across much of England reaching record levels for the month, driving up electricity demand for cooling. The situation echoes similar events in other countries during extreme weather, including the Texas grid crisis in 2021 and European heatwave-related shortages in 2022. The carbon-intensive nature of the solution — firing up gas plants and importing power from continental grids — also highlights the tension between decarbonization goals and energy security during extreme weather events.
The £10 million balancing payment — nearly 20 times normal market prices — demonstrates the extreme costs of maintaining grid stability during weather events exacerbated by climate change. As heatwaves become more frequent and intense, the UK's energy system will face increasing pressure, requiring investment in grid resilience, storage capacity, and demand-side management. The incident also underscores the importance of interconnector capacity as a critical component of energy security, while revealing its vulnerability when European neighbors face similar weather conditions simultaneously.