Sunbury BESS

Sunbury BESS is a 200 MW battery storage project in planning, connecting to the National Grid (England & Wales) network at Laleham GSP (SEPD), with capacity due from February 2031. The connection agreement is held by Sunbury BESS Ltd.

Project stageIn planning

Planning (current stage)
Consented (not yet reached)
Construction (not yet reached)
OperatingFrom Feb 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-001883
Customer: Sunbury BESS Ltd
Technology: Energy Storage System
Total capacity: 200 MW
Change in this agreement: +200 MW
Capacity effective from: 24 February 2031
Connection site: Laleham GSP (SEPD)
Transmission owner: National Grid (England & Wales)
Connection type: Embedded (connects through the local distribution 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 Laleham GSP (SEPD) · 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