Maps recommendations list

400kV upgrade of Brinsworth to Chesterfield Double Circuit and Chesterfield-High Marnham Double Circuit. New High Marnham and Chesterfield 400kV substations. This is to help alleviate high power flows in and around the Humber area.

Construct a new Chesterfield – Ratcliffe-on-Soar 400kV double circuit. This is to help alleviate high power flows in and around the East Anglia and Humber area.

Replace the conductors on the existing circuits between Brinsworth and Thorpe Marsh, Brinsworth and Chesterfield, and Chesterfield and Ratcliffe with higher capacity conductors

Replace existing OHL conductor on the southern (Elvanfoot - Harker) section of the strategic north-south Strathaven - Harker (ZV route) corridor with high temperature low sag (HTLS) conductor.

New second 400 kV cable transmission circuit from Elstree to St. Johns Wood in the existing tunnel, and carry out associated work, including modifying Elstree 400 kV and St. John’s Wood 400 kV substations. This will improve the power flow into London.

Reconfigure the network between Stalybridge and Thorpe Marsh

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

Replace the conductors in the 400 kV Feckenham to Hams Hall single circuit with higher-rated conductors to increase their thermal ratings.

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

Upgrade the existing network to a higher voltage between Harker and Stella West