Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, if (a) his Department and (b) Ofgem will make an estimate of the cost of the (i) sealing end compounds and (ii) other costs associated with the construction of the (A) underground and (B) other sections of National Grid’s proposed Norwich to Tilbury route.

It is the responsibility of the developers of electricity network projects – in this case National Grid Electricity Transmission (NGET) - to propose the route and obtain planning permission for that route. NGET presented cost estimates for the Norwich to Tilbury proposals in their April 2024 Strategic Options Backcheck and Review.

Ofgem reviews proposed project costs and ensures that network companies spend efficiently. Electricity network reinforcements are only approved where they are in the interests of consumers and help reduce system costs. Ofgem will conduct a detailed cost assessment of this project for the Accelerated Strategic Transmission Investment Project Assessment stage.