Energy system operator says sum needed to deliver clean power targets while meeting rising demand is up by 50%

The cost of rewiring Great Britain’s electricity networks through the 2030s is now 50% higher than before the Labour government came to power, and could reach almost £90bn in the next decade, according to the energy system operator.

Building new high-voltage transmission lines and infrastructure to connect low-carbon energy to the grid in the 2030s was initially forecast by the energy system operator to cost £58bn.