Written Question·Department for Energy Security and Net Zero·UIN 69418
Energy Supply: Costs
Tabled: 21 July 2025
Answered: 2 September 2025
Named DayQuestion
Alicia Kearns
Conservative — Rutland and Stamford
To ask the Secretary of State for Energy Security and Net Zero, what comparative estimate his Department has made of the costs of transmitting energy by (a) undersea cables and (b) pylon networks.
Answer
Michael ShanksThe Department has not conducted its own assessment of the comparative costs of undersea cables and pylon networks. However, in April 2025, the Institution of Engineering and Technology published average lifetime cost estimates which suggest that 400kV AC...
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