Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, what recent estimate he has made of the relative costs per km of (a) overhead, (b) underground and (c) offshore electricity transmission cables.

The Government keeps abreast of the various technologies that can be used to help us achieve clean power by 2030, including the various means of laying cable, but has not yet made an estimate of the relative costs of cabling since it came into power.