Where the data comes from

Every report names its sources beside each finding, with the date it was read. This page lists them in one place, with the licence, so you can read the same records yourself.

Postcodes

postcodes.io, an open service built on Office for National Statistics and Ordnance Survey open data. Gives the coordinates, the council and the country for a postcode. Open Government Licence v3.0. https://postcodes.io

Planning

planning.data.gov.uk, the national planning data platform run by the Ministry of Housing, Communities and Local Government. The Environment Agency Flood Map for Planning reaches us through it: the flood risk zones and the flood storage areas. Open Government Licence v3.0. https://www.planning.data.gov.uk/dataset/

Flood

The Environment Agency. The Flood Map for Planning via planning.data.gov.uk, the real time flood monitoring API for warnings, warning areas and river gauges, the Risk of Flooding from Rivers and Sea layer on the Environment Agency ArcGIS server, and the Risk of Flooding from Surface Water map service. England only. Open Government Licence v3.0. The free official service for the public is https://check-long-term-flood-risk.service.gov.uk/postcode

Attribution

Contains public sector information licensed under the Open Government Licence v3.0. Contains OS data copyright Crown copyright and database right 2026.