Maps recommendations list

Replace the conductors on the existing circuit between Feckenham and Walham with higher capacity conductors

Thermal Upgrade of the Cottam to Market Harborough to Grendon circuit to allow them to operate at higher temperatures, and increase their thermal rating.

Construct a new 400 kV double circuit in Lincolnshire to facilitate power transfer requirements across the relevant boundaries. Substation works are required to accommodate the new circuits.

Replacing an existing transformer at Harker substation with a new one of higher rating to prevent overloading following transmission system faults.

Banking of existing transformers supergrid transformer 5 and supergrid transformer 9A at Harker substation and connecting directly to the Fourstones – Harker 275 kV circuit to help alleviate overloading of supergrid transformers following transmission system faults.

Upgrade the Hinkley Point to Bridgewater 275 kV circuits to 400 kV including insulator and conductor replacement. Connect the circuits to the new Hinkley Point 400 kV substation.

New circuit between Harburn and Gala North

This project is currently required to enable the development of a robust and reliable offshore network connection and will be reappraised in the detailed design stage

Hackney, Tottenham and Waltham Cross substation uprate from 275 kV to 400 kV, and the double circuit route connecting them. This will strengthen the power flow into London, via Rye House, down to Hackney.

Replace the conductors in the Feckenham to Ironbridge circuit with higher-rated conductors