All 4,839 locked candidate sites. Colours match the map key.
The map is deliberately not a display of every Land Registry polygon within 10 minutes of a station. The candidate universe is created before the web filters are applied.
Opportunity Strength is a strategic screening indicator, not an overall probability of planning success. Delivery / Review Complexity is intentionally separate.
Public-transport stop geography used for the station universe and routing origins.
SourceIndicative title extents used as land-parcel screening geometry.
SourceNational constraint and planning-context evidence.
SourceSupplementary land-use evidence and 600-second pedestrian catchments.
SourceQualifying service evidence, 10-minute walking catchments and resolved 35/45 dph frequency tiers.
Official SAM polygons are intersected with the locked candidate geometry; dominant class, range and coverage evidence are retained.
Official PTAL and Access Index values are joined for all 1,224 London-context sites, with within-site range and join basis retained.
The engine supports exact 100 m site scores. Values remain withheld from site details until DfT confirms a supported bulk retrieval and republication route; no coarser geography is substituted.
SourceNearest current postcode plus OA21, LSOA21, MSOA21 and LAD25 codes are joined locally from the official ONS Postcode Directory.
Basemap: MapLibre GL JS with OpenFreeMap Dark by default; Positron and Liberty styles provide Grey and Colour alternatives. OpenFreeMap / OpenMapTiles / OpenStreetMap attribution remains visible on the map.
Reuse: the product is built from public/open or reusable evidence sources, each subject to its own attribution and licence conditions. A source register is retained with the project.
Interpretation: this is national opportunity screening. It is not a planning determination, legal title opinion, viability assessment or valuation. Site-specific due diligence remains necessary.
Public access: no account is required. The page is public and may be indexed by search engines. A shortlist, if used, is stored only in the user's own browser.