National Grid PLC (LSE:LON:NG.) has released its ‘RIIO-T3 Business Plan’, outlining infrastructure investments of up to £35 billion over a five-year period from April 2026.
The investment includes £11 billion for maintaining and upgrading existing networks and initial Accelerated Strategic Transmission Investment (ASTI) projects.
A further £24 billion is earmarked for increasing network capacity and addressing future projects triggered by the UK government’s evolving energy priorities.
National Grid intends to upgrade 3,500 kilometres of overhead lines and aims to connect 35GW of new generation and storage capacity.
John Pettigrew, chief executive of National Grid plc, called it “the most significant step forward in the electricity network that we've seen in a generation”.
He said the investment will nearly double Britain’s energy capacity.