Britain’s energy regulator Ofgem on Tuesday proposed a draft package of £8.9 billion to support a major expansion of the country’s high-voltage electricity network, marking the largest upgrade to the system since the 1960s.
The investment, part of a broader plan expected to reach £80 billion, aims to modernise the grid and connect new sources of renewable power to meet future energy demands and enhance security of supply.
“This record investment will deliver a homegrown energy system that is better for Britain and better for customers,” said Jonathan Brearley, chief executive of Ofgem.
The initial funding will support 80 transmission projects across the UK over the next five years. An additional £1.3 billion in funding has also been earmarked and could be unlocked subject to further approvals.
According to Ofgem, the planned works will involve upgrading more than 4,400 kilometres of overhead lines and building 3,500 kilometres of new circuits, including offshore infrastructure. These upgrades are intended to significantly increase grid capacity, helping to integrate up to 126 gigawatts (GW) of renewable electricity generation by 2030.
“These 80 projects are a long-term insurance policy against threats to Britain’s energy security and the instability of prices,” Brearley said. “Doing nothing is not an option and will cost consumers more – this is critical national infrastructure.”
The regulator said the investment will help shield households from volatile global gas markets by enabling more reliable domestic energy sources, including solar, wind, and storage technologies. The expanded grid is expected to improve energy resilience and reduce long-term costs for consumers.
The proposals are now open to consultation, with final decisions on the funding to be confirmed by the end of 2025.
