About Scotland Grid Watch

An independent, non-commercial map of Scotland's electricity system: where power is generated, how it flows south across grid boundaries (especially B4 and B6), and how much wind is turned down (curtailed), what that costs, and why.

Important caveats

Live figures are provisional. "Live" generation and curtailment come from Elexon BMRS data published minutes after real time, and they get revised later. Settlement figures are indicative, not final.
Turned-down MW = each wind unit's Physical Notification (what it planned to generate) minus the latest NESO-accepted instruction in effect. It is a measure against plan, not against what the wind could have produced. Only units in the Balancing Mechanism are counted; smaller embedded farms are not.
MWh since midnight uses Elexon indicative settlement volumes for completed periods, plus an estimate for the last hour or so, which is labelled as such.
Demand is an estimate (method shown in the panel). Flow direction on the map is indicative, based on NESO forecast boundary flows, not measured live flows.
Wind farms are matched to Balancing Mechanism units with a recorded confidence level. ≈ marks a low-confidence match.
Nothing here is invented: where a value is unknown, it is left blank.

Data sources and licences

Curtailment, live generation, acceptances: Elexon Insights Solution (BMRS) API, data.elexon.co.uk. Elexon BMRS data licence.
Constraint costs, boundary flows and limits, ETYS boundaries: NESO Data Portal. NESO Open Data Licence.
Power stations: DESNZ Renewable Energy Planning Database (Q2 2026) and DUKES 5.11 (May 2026). Open Government Licence v3.0.
Transmission lines and substations (north): SSEN Transmission open data. CC BY 4.0.
Transmission lines, upgrades, demand connections, generation pipeline, ANM curtailment (south): SP Energy Networks open data portal. SP Energy Networks Open Data Licence, based on CC BY 4.0.
Gap filling only: OpenStreetMap (ODbL).
Site details: Wikidata (CC0). Photos: Wikimedia Commons, openly licensed only (CC BY / BY-SA / CC0), credited on each card.
Basemap: OpenFreeMap, © OpenMapTiles, data © OpenStreetMap contributors. Map rendering: MapLibre GL JS.

Attribution statements

Contains data from SP Energy Networks, licensed under the SP Energy Networks Open Data Licence (based on CC BY 4.0). The data has been modified: filtered, simplified and reprojected for web display. Provided by SP Energy Networks as-is, without warranties, as set out in the licence.

Contains data © SSEN Transmission, licensed under CC BY 4.0. The data has been modified: filtered and simplified for web display.

Supported by National Energy System Operator (NESO) Open Data. Contains NESO data licensed under the NESO Open Data Licence.

Contains BMRS data © Elexon Limited copyright and database right.

Contains public sector information licensed under the Open Government Licence v3.0 (DESNZ REPD, DUKES).

© OpenStreetMap contributors, available under the Open Database Licence (ODbL).

Photos: Wikimedia Commons contributors. Each photo is credited with its author and licence (CC BY, CC BY-SA or CC0) on its wind farm card.

Modifications: datasets have been filtered to Scotland, simplified, reprojected and joined for display. No endorsement by any data provider is implied.

Contact

Corrections and feedback: [email protected]