Editorial review
Reviewed by the Maplify Editorial Team. Editorial policy
UK Power Networks, with a publicly accessible map service hosted by Greater London Authority
UK Power Networks Substations Map
View UKPN secondary substations on the London public map, click markers for available attributes and understand the geographic and data-access limitations.
Verification
View UKPN secondary substations on the London public map, click markers for available attributes and understand the geographic and data-access limitations.
How to Interpret the Map — Layer Key
UKPN London secondary substation
A secondary substation point from the GLA-hosted UKPN dataset. Voltage, transformer and utilisation details can be read by clicking it.
Point markerWhat This Layer Shows
This overlay maps secondary substations published as UKPN data by the Greater London Authority ArcGIS public map. Marker details may include substation design, voltage, transformer count, utilisation band and demand-headroom attributes, depending on the record.
The map is restricted to the public London dataset. It does not contain UKPN secondary substations across its entire South East and East England licence area. The operator’s own Huwise API currently requires free user registration.
Why It Matters for Your Site or Property
Substations and their public attributes can help screen potential electricity-network constraints for development, retrofit, charging and renewable energy projects.
A published utilisation band is not the capacity reserved or available for a new grid connection; request formal advice from UK Power Networks.
Planning and Property Impact
For a new power connection or capacity assessment, seek the relevant operator’s current network information and a formal connection quotation.
Do not use a marked site as an excavation safety record, or infer a property’s feeding substation without operator confirmation.
How to Interpret This Layer
- 1Open Maplify around London, then expand Map layers > Electricity Networks > UK Power Networks.
- 2Enable UKPN Secondary Substations (London), zoom in and select a marker to see the published source fields.
- 3Use the UKPN open data portal (free registration required for the full records) if you need coverage or information beyond the GLA layer.
Official Data Source
Publisher
UK Power Networks, with a publicly accessible map service hosted by Greater London Authority
Coverage
London only. UKPN also serves South East and East England, but its own full data API requires free registration.
Licence
CC BY 4.0; credit UK Power Networks (GLA public mapping reproduction)
Official source
https://data.london.gov.uk/dataset/secondary-sites-v86m3
Data Freshness
Planned refresh frequency
Check the source dataset for its update date; GLA public service may not reflect the latest UKPN portal records
Important Limitations
- Coverage is London only; absence of a pin outside London is not evidence of missing electricity infrastructure.
- The public GLA-hosted map can lag the operator’s primary dataset, and UKPN’s unrestricted API is not available anonymously.
- Reported utilisation and transformer characteristics do not show firm capacity available for a future connection.
- Location data is for background site screening and must not replace utility plans or safe-digging practice.
Common Use Cases
Developers
Identify publicly mapped UKPN secondary assets before requesting connection information.
Energy consultants
Review available voltage and utilisation attributes in the mapped London subset.
Related Layers
This layer is commonly checked alongside these related layers.
Frequently Asked Questions
Does the UKPN overlay cover all of South East England?
No. The immediately accessible public map used here covers London. UKPN’s complete data portal requires a free registered account.
Can I estimate a new connection offer from the utilisation band?
No. A published utilisation figure is not guaranteed spare capacity or a firm connection quotation.
Check UK Power Networks Substations Map on Maplify
Open the map, generate a site report or save your search to come back to it later.
References and Methodology
Professional disclaimer
Maplify is a screening and due-diligence tool. This layer does not constitute professional advice, a planning decision, or a legal determination of any kind. Always verify critical matters with the relevant local planning authority, the data provider, or a qualified professional before relying on this information for a transaction, planning application, or development decision.