Mablethorpe Storage

Mablethorpe Storage is a 1.5 GW battery storage project in planning, connecting to the National Grid (England & Wales) network at Lincolnshire Coastal Node 400kV Substation, with capacity due from November 2031. The connection agreement is held by Theddlethorpe Flexible Generation Limited.

Project stageIn planning

Planning (current stage)
Consented (not yet reached)
Construction (not yet reached)
OperatingFrom Nov 2031 (not yet reached)
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-001979
Customer: Theddlethorpe Flexible Generation Limited
Technology: CCGT (Combined Cycle Gas Turbine), Energy Storage System
Total capacity: 1.5 GW
Change in this agreement: +1.5 GW
Capacity effective from: 30 November 2031
Connection site: Lincolnshire Coastal Node 400kV Substation
Transmission owner: National Grid (England & Wales)
Connection type: Direct connection to the transmission network
NESO project status: Scoping

Connection site

The marker shows the connection substation, not the project itself, with the transmission network around it.

Projects connecting near Lincolnshire Coastal Node · Grid map

Source: NESO Transmission Entry Capacity (TEC) register, downloaded 8 November 2026. Contains data from NESO, licensed under the NESO Open Data Licence. Report a problem