The National Energy System Operator has released revised cost estimates for upgrading Great Britain’s electricity infrastructure through the 2030s, indicating investments could reach approximately £89bn. This represents a significant increase from the previously forecasted £58bn figure, a rise attributed to several interconnected factors including inflation, an accelerated rollout of low-carbon energy projects, and rising electricity demand from emerging sectors such as datacentres.
The updated recommendations align with the UK government’s 2030 clean power action plan, which aims to establish the country as a clean energy superpower. The Labour government has set ambitious targets to double onshore wind capacity, triple solar power installations, and quadruple offshore wind capacity by the end of the decade. These objectives represent an acceleration of the previous government’s timeline by five years.
Neso has identified 43 network projects required for delivery during this period, with 16 of these projects being newly added to the recommendations compared to the original 2024 forecast. Notable new initiatives include infrastructure to connect windfarms located in the Celtic Sea to three separate connection points across south Wales and south-west England. The recommendations also incorporate refinements to previously identified options, reflecting improved planning and project maturity.
Energy Minister Michael Shanks characterized the investment as part of a strategic approach to building a future-ready energy system that would enhance energy independence and support economic growth. National Grid’s transmission business head emphasized the company’s ongoing commitment to network upgrades while maintaining focus on consumer value and cost reduction. The projections also reflect improvements in project queuing systems and transmission planning that have accelerated the timeline for delivering network upgrades.
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