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Grid infrastructure β€Ί Connection queue β€Ί Interconnector

INTERCONNECTOR Β· NGET

Nautilus

Nautilus is a 1.5 GW interconnector project in planning, connecting to the National Grid (England & Wales) network at Wallend 400kV Substation, with capacity due from October 2029. The connection agreement is held by National Grid Interconnector Holdings Limited.

Project stageIn planning
  1. Planning (current stage)
  2. Consented (not yet reached)
  3. Construction (not yet reached)
  4. OperatingFrom Oct 2029 (not yet reached)
  5. Closed (not yet reached)

Scoping and awaiting consents are both shown as planning. A connection agreement does not mean the project will be built: many queue projects never reach construction.

Connection details

NESO project number
PRO-000976
Customer
National Grid Interconnector Holdings Limited
Technology
Interconnector
Export capacity
1.5 GW
Import capacity
1.5 GW
Change in this agreement
+1.5 GW
Capacity effective from
31 October 2029
Connection site
Wallend 400kV Substation
Transmission owner
National Grid (England & Wales)
Connection type
Interconnector
NESO project status
Scoping

Connection site

The connection site could not be placed on the map.

Projects connecting near Wallend Β· Grid map

Other projects at Wallend 400kV Substation

Source: NESO interconnector register, downloaded 8 November 2026. Contains data from NESO, licensed under the NESO Open Data Licence. Report a problem