Aren’t a lot of extra north south links in progress already? So won’t it be better soon?
https://www.nationalgrid.com/the-great-grid-upgrade
Approx 10GW down in the east coast alone in various stages right now...
IIRC it's still years out, though less than a decade.
https://www.nationalgrid.com/the-great-grid-upgrade
Approx 10GW down the east coast alone in various stages right now, jumping the current bottleneck (B6) between Scotland and England...
Also see: