Data attribution and licences
GB Grid Data aggregates published network data from the six GB distribution network operators, the transmission owners and the National Energy System Operator. This page records where each dataset comes from, the licence it is published under, and the notices those licences require us to carry.
This data has been modified
We do not present the operators' data verbatim. Voltage-level records are clustered into physical sites, records are matched and merged across operators and datasets, generation and demand headroom are calculated, status indicators are derived from that headroom against configurable thresholds, and substation positions are sometimes taken from a different dataset than the one supplying the electrical values. Every figure should be treated as our derived interpretation of the published source, not as an official statement by the operator. Verify directly with the operator before making a connection decision.
For material published under Creative Commons Attribution 4.0, this is the notice of modification required by section 3(a)(1)(B) of that licence. No operator endorses GB Grid Data or the way we use their data.
Distribution network operators
Supported by NGED Open Data
East Midlands · West Midlands · South Wales · South West
London · South East · East
Supported by Northern Powergrid Open Data
North East · Yorkshire
Central Scotland · South Scotland · Merseyside · Cheshire · North Wales
North West England
North Scotland · Central Southern England
Transmission owners
Official data from SSEN Transmission OpenDataSoft portal
Supported by National Energy SO Open Data
Coordinates are GSP boundary centroids, not precise substation locations. Phase 15: Investigate NGET for precise coordinates.
Transmission generation heat map published by SP Energy Networks. Coordinates are indicative.
System operator
Supported by National Energy SO Open Data
Transmission Entry Capacity register and embedded register, used for the connection queue.
Third-party notices
Some of the datasets we use carry rights belonging to third parties rather than to the operator publishing them. Those notices are reproduced here as required.
- Office for National Statistics licensed under the Open Government Licence v.3.0 Contains OS data © Crown copyright and database right [2019-]
- SSEN Transmission is a trading name of Scottish Hydro Electric Transmission plc, company number SC213461
The Ordnance Survey and Office for National Statistics notice above is reproduced exactly as the operators' dataset metadata gives it. It applies to UK Power Networks, Northern Powergrid and Electricity North West substation location, connection-register and capacity datasets, which supply part of the positions and figures shown on our maps.
OpenStreetMap substation positions
Where no DNO or TSO dataset we are licensed to use publishes a substation's location, we may place it on the map from OpenStreetMap, matched by operator, name and voltage. Those positions are © OpenStreetMap contributors and available under the Open Database Licence 1.0. They are labelled "Position from OpenStreetMap" on the site page, used for the map only, and not included in search results or lists.
Basemap
Map tiles by Stadia Maps and OpenMapTiles, data © OpenStreetMap contributors. The basemap credit covers the map imagery only; the substation positions plotted on it are credited above.
Licences last verified against the operators' live portal metadata on 27 September 2026. If you believe a credit here is wrong or incomplete, please tell us and we will correct it.