National Grid to Lead £70bn Network Expansion in £100bn Grid Upgrade
National Grid along with Scottish Power and SSE plans a £70bn network expansion as part of a £100bn UK grid upgrade, driving transmission charges up from £31 to £83 per household since 2015. Suppliers warn that batteries could defer billions in infrastructure spend, risking lower grid capex.
1. £70bn Network Expansion for National Grid
National Grid is set to invest £70bn in high-voltage network upgrades between 2026 and 2031 as part of the UK’s wider £100bn grid modernisation plan aimed at boosting transmission capacity for renewable energy flows.
2. Rising Transmission and Distribution Charges
Household transmission costs have climbed from £31 in 2015 to £83 now, while distribution fees rose from £84 to £117, reflecting years of underinvestment and underpinning National Grid’s revenue requirements for its expansion programme.
3. Flexibility Technologies Challenge Grid Economics
Trials by major suppliers show that deploying batteries and smart tariffs can deliver annual consumer bill savings of £300–£800 and defer billions in grid reinforcement, potentially reducing long-term demand for National Grid infrastructure.
4. Regulatory Framework and Future Outlook
Ofgem’s approval of the funding package and government decarbonisation targets underpin the £100bn grid upgrade, but emerging flexibility solutions and cost pressures may force National Grid to revise its capital expenditure forecasts.