Question to the Department for Energy Security & Net Zero:

To ask His Majesty's Government, further to the remarks by Lord Callanan on 22 November that "it is up to 10 times more expensive" to bury power lines (HL Deb col 740), what evidence they have to support that conclusion.

The evidence to support the claim that underground lines can be up to 10 times more expensive than overhead lines comes from an independent 2012 report endorsed by the Institution of Engineering & Technology called “Electricity Transmission Costing Study”, which can be found at https://www.theiet.org/impact-society/factfiles/energy-factfiles/energy-generation-and-policy/electricity-transmission-costing/ (also attached).