Other improvements will include the running of new and some existing high voltage cables underground, particularly where they affect areas of outstanding natural beauty, and the construction of a new undersea link connecting Scotland with England and Wales.

BBC: Ofgem permits ?12 energy bills rise for grid upgrade

It also wants any new high voltage transmission lines to avoid areas of outstanding natural beauty, national parks, world heritage sites and green belt land.

BBC: Fears over pylons in beauty spots

As well as Snowdonia, four designated areas of outstanding natural beauty, in Anglesey, Kent, Lincolnshire and Somerset would be affected by the new lines.

BBC: Fears over pylons in beauty spots