Data sources & attribution

Tree Preservation Orders

TPO records are aggregated from local planning authority open data: the planning.data.gov.uk national dataset, authority ArcGIS/WFS/GeoJSON endpoints, and data released to us under the Freedom of Information Act and Environmental Information Regulations. Coverage varies by authority — see the authority list for what we hold. TPO data is indicative: the legal record is always the order held by the authority that made it.

Contains public sector information from planning.data.gov.uk — © Crown copyright and database right 2026, licensed under the Open Government Licence v3.0.
Contains Barnsley Metropolitan Borough Council information © Barnsley Metropolitan Borough Council, licensed under the Open Government Licence.
Contains information provided by Rugby Borough Council, licensed under the Open Government Licence v3.0.
Individual planning authorities' data is reproduced under the Open Government Licence v3.0 or the terms stated by the releasing authority.

Conservation areas

Conservation-area boundaries come from the planning.data.gov.uk national compiled dataset, which combines data supplied directly by planning authorities with Historic England's national compilation. The dataset's own guidance applies: it is indicative, not definitive — coverage does not yet include every English authority, and the designating authority holds the legal record.

© Crown copyright and database right 2026.
© Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026.
Licensed under the Open Government Licence v3.0.

Postcodes

Postcode locations come from Ordnance Survey Code-Point Open.

Boundaries

Accuracy

We refresh live sources weekly to monthly and state a data snapshot date on authority pages where the source is a one-off release. If you spot an error, tell us — and before carrying out tree work, always confirm with the planning authority.