NESO Data Portal

What it contains

200+ datasets. Relevant: Embedded Register, Interconnector Register, historic and forecast demand (half-hourly), constraint breakdowns, carbon intensity, Future Energy Scenarios, TEC Register, generation mix.

When you need it

Not yet mapped to a project stage. The stage axis is a first pass against a draft matrix, and a record with no stage means nobody has placed it rather than that it is useful at none.

Coverage and detail

Geographic

GB

Nations

England, Scotland, Wales

Resolution

National / GSP / settlement period

Formats

CSV, JSON, XLSX

Update cadence

Real-time to annual, varies by dataset

Access and machine route

Licence as stated

NESO Open Data Licence (OGL-compatible; check per dataset)

Assertion source

as published by National Energy System Operator (NESO) - publicly owned since Oct 2024, formerly National Grid ESO

Protocol

CKAN + datastore SQL (PostgreSQL)

Endpoint

https://api.neso.energy/api/3/action/

Harvest note

yes-automated

Caveats

Tight rate limits require a throttled harvester. GB only. Transmission-level - for distribution capacity see I6.

Classification

Category

Infrastructure & Networks

Sub-category

3.2 Electricity networks & grid capacity

Assigned by

Stated by the source

Depth domain

Surface

Data form

Time series, Tabular

Evidence confidence

Not yet assessed. Only a person can set this.

How current this entry is

Last updated here

2026-09-22

Last checked against the holder

2026-09-07

Checked by a person

Not yet. Nobody has read this entry.

Catalogue id

neso-data-portal