Britain has widely invested in recent years to expand its renewable energy capacity to reduce dependence on fossil fuels and support a green transition. However, inadequate transmission infrastructure has prevented this goal from being achieved.
High Costs of Balancing the Grid
Despite the launch of several new wind and solar projects, Britain remains heavily reliant on natural gas. The country spends up to £50 million a day to balance its electricity grid. Recently, on October 14, the grid operator spent around £47.9 million to shut down wind farms in areas with surplus electricity. In this situation, gas power plants have also been activated in areas with electricity shortages.
Infrastructure Challenges and Need for Investment
Last September, Britain spent £505 million on grid balancing, the highest monthly cost recorded to date. This figure is expected to reach £3.2 billion next year. In total, wind farms and hydropower plants with a capacity of 9 gigawatts, equivalent to supplying electricity to about 8 million households, incurred costs for not generating electricity on October 14. Meanwhile, the grid operator has covered costs related to gas and biomass power plants and purchased additional electricity from Europe.
The National Grid operator, Neso, was forced to request emergency assistance from France in early October to secure necessary electricity supply. According to Shivam Malhotra, Head of Power Trading at LCP Delta, "The system was tight in terms of electricity supply. This is an old story of insufficient infrastructure to transmit electricity to areas in need, leading to the shutdown of wind farms." Currently, there are only two power cables between Scotland and England, creating a "B6 border bottleneck."
The costs associated with managing this bottleneck are about £800,000 per day on average for the 2026-2027 period, nearly double the average for 2025-2026. Meanwhile, during the summer, Neso faced serious infrastructure challenges as electricity demand surged. This prompted Neso to investigate claims regarding a potential cover-up of an impending blackout during record-high temperatures in late June.
The UK energy regulator, Ofgem, has reported that demand for new grid connections has increased from 41 gigawatts to 125 gigawatts between November 2024 and June 2025. This has left many green energy projects waiting in line. The National Grid has submitted a package of additional proposals to Ofgem to seek approval for further investments in its electricity transmission network. This package includes 19 projects in England and Wales, representing approximately £4.5 billion in proposed investment.
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