Evidence policy
Sources used in Nestor property research
Nestor prefers exact, current primary evidence, links to the page retrieved, and states when a fact could not be verified.
Last reviewed 8 August 2026
Source hierarchy
- The exact property listing for seller-supplied details such as asking price, room descriptions, images, and stated tenure.
- Official records and public bodies for transactions, energy certificates, flood information, school inspections, reported crime, communications coverage, planning, and transport.
- Original service providers for routes, timetables, products, or coverage that they operate.
- Reputable secondary sources only when primary evidence is unavailable, with lower confidence and a clear limitation.
Common official publishers
- HM Land Registry sold-price search for completed transactions in England and Wales.
- GOV.UK energy certificate service for EPC records in England, Wales and Northern Ireland.
- Environment Agency flood-risk service for England, with separate national services where applicable.
- Ofsted reports for education providers in England, with the relevant national inspectorate elsewhere.
- Police.uk open data for approximate street-level reported crime in England, Wales and Northern Ireland.
- Ofcom coverage information for communications context.
What a link does and does not prove
A source link shows where the claim was retrieved. It does not guarantee that the publisher record is complete, current, correctly matched to the property, or suitable for a legal or financial decision. Listing statements are seller or agent claims until independently verified.
Freshness and geography
Every dataset has its own release cycle and geographic definition. Reports should name the relevant period and jurisdiction. Police locations are approximate; school ratings do not prove admission; modelled flood or broadband coverage does not replace property-specific enquiries.