Didcot BESS 1

Didcot BESS 1 is a 750 MW battery storage project in planning, connecting to the National Grid (England & Wales) network at Chiltern Connection Node A 400kV Substation, with capacity due from October 2037. The connection agreement is held by Downing Renewable Developments LLP.

Project stageIn planning

Planning (current stage)
Consented (not yet reached)
Construction (not yet reached)
OperatingFrom Oct 2037 (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-003446
Customer: Downing Renewable Developments LLP
Technology: Energy Storage System
Total capacity: 750 MW
Change in this agreement: +750 MW
Capacity effective from: 31 October 2037
Connection site: Chiltern Connection Node A 400kV Substation
Transmission owner: National Grid (England & Wales)
Connection type: Direct connection to the transmission network
NESO project status: Scoping
Connections reform gate: Gate 1

Connection site

This project connects at a new substation (a “connection node”) that has not been built or located yet.

Projects connecting near Chiltern Connection Node A · 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