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An aerial shot of fields and buildings

New Essential Infrastructure

IFA2 Connection

South West

Constructing an electricity substation to connect the new IFA2 interconnector to the national electricity network.

Project description

We are carrying out work at National Grid’s existing Chilling Lane site as part of a larger scheme to connect the electricity systems of the UK and France. Connecting the electricity systems provides diverse sources of electricity and helps to keep supplies secure and affordable.

The new substation at our Chilling Lane site will be connected to the converter station at Daedalus via underground cables. The substation will allow the power from the interconnector via the converter station to be fed into the national transmission network.

We have agreed the external design and appearance of the operational control buildings with the Local Planning Authority (LPA) to minimise any visual impact from the site. The site will be an outdoor Gas Insulated Switchgear (GIS) substation, within the boundaries of the existing site. All new equipment at site will be lower than or the same height as the existing overhead line gantries there.

Work Schedule

IFA Timeline


Traffic management

We have now finalised our plans for how best to access the site for construction, having explored a number of alternatives following conversations with local residents and representatives. We have concluded that the best access is the existing highway through Hook village. More information about our plan can be found by downloading the factsheet “Chilling Lane – Traffic Management” below. Our traffic management plan has been prepared in consultation with the local highways department, seeking to minimise disruption to local neighbours.