Project Assessment: Hackney Waltham Cross Upgrade Project

Project Assessment: Hackney Waltham Cross Upgrade Project | Ofgem Please enable JavaScript in your web browser to get the best experience. BETA This site is currently in BETA. Help us improve by giving us your feedback . Close alert: Project Assessment: Hackney Waltham Cross Upgrade Project Publication type: Consultation Publication date: 26 February 2026 Closing date: 26 March 2026 Status: Open Topic: Electricity transmission Subtopic: Accelerated Strategic Transmission Investment (ASTI) Get emails about this page Print this page Related links Decision on accelerating onshore electricity transmission investment Share the page Share on Facebook Share on Twitter Share on LinkedIn We are consulting on our project assessment of National Grid Electricity Transmission’s Hackney Waltham Cross Upgrade Project. Consultation description National Grid Electricity Transmission’s Hackney Waltham Cross Upgrade Project (HWUP) is a project under the Accelerated Strategic Transmission Investment (ASTI) mechanism in the RIIO-2 Price Control Framework. At the project assessment stage, we review and ultimately set revenue and outputs associated with delivery of an ASTI project. HWUP consists of uprating 19.5km of overhead lines between Hackney, Tottenham and Waltham Cross substation, from existing 275kV to 400kV, and reconductoring of the 29km route between Pelham-Rye house and Waltham Cross. The project is triggered by the need to provide reinforcement of the route between Pelham and Hackney substations to accommodate increases in future generation. NGET are reinforcing the network to meet future demand, boost energy security and help the nation become more self-sufficient. Who should respond We would like views from people with an interest in the costs of electricity transmission infrastructure and the transmission owners. We particularly welcome responses from stakeholders impacted by the project. How to respond Submit your response by 26 March 2026 by emailing MajorProjects.LTPD@ofgem.gov.uk . Consultation documents Consultation: Hackney Waltham Cross Upgrade Project Assessment [PDF, 276.79KB] Get emails about this page Print this page Related links Decision on accelerating onshore electricity transmission investment Share the page Share on Facebook Share on Twitter Share on LinkedIn Close Notify me Would you like to be kept up to date with Project Assessment: Hackney Waltham Cross Upgrade Project ? subscribe to notifications: Email Submit Close