UK National Data Library — data.gov.uk

The index behind British public data. data.gov.uk — rebranded the National Data Library, "the home of UK public data to inform decisions and build services" — is where hundreds of UK public bodies register their datasets, from Whitehall departments down to single-district councils. A live Directory query during our August 2026 research pass returned 4,540 datasets across 227 result pages, each entry a structured card carrying a title, publishing body, description, topic, format and the publisher's own rights statement.

Six curated themes sit on the front door — Business and economy, Environment, Government, Land and property, People, Transport — but the working surface is the Directory underneath: filter by Publisher (hundreds of public bodies), by one of fourteen Topics, or by one of thirteen named Formats plus Other. For leisure-facilities work it behaves as a discovery layer rather than one tidy table, because there is no leisure topic. District councils publish their leisure-centre, park, playground and open-space registers here, usually as GIS layers sitting quietly under Environment or Mapping. Get a sample of this dataset cut to the councils and topics you actually model.

One line per dataset, five facts deep. Three Directory entries exactly as they ship:

Title       : ABC_OpenSpaces
Publisher   : Ashford Borough Council
Description : areas of open space within the borough of Ashford, Kent
Topic       : Environment
Format      : GEOJSON

Title       : Air Quality Points
Publisher   : Wirral Metropolitan Borough Council
Description : NO2 monitoring tube locations

Title       : Tree Preservation Orders
Publisher   : Ribble Valley Borough Council

Entry one is the classic council leisure artifact — a borough's open-space register as a GeoJSON layer, ready to drop into a desktop GIS or a PostGIS table. Entries two and three show the range parked beside it: environmental monitoring points and legal tree orders, from metropolitan and rural authorities respectively. Every entry resolves to a named public body, and that is what makes publisher-scoped collection viable — pick your districts, take their registers, reconcile nothing.

Five fields define every Directory entry, each definition checked against live search results during the August 2026 research pass. Together they form the documented core of the catalogue card; publisher-specific extras are folded into the footnote below the table.

Two conventions worth internalizing before you build. publisher is the real join key — with no leisure topic available, district and metropolitan borough councils are how you slice the catalogue. And format values arrive uppercase and varied (GEOJSON, SHP, WFS, XLSX-style spreadsheets under XLS), so normalise the column before routing files to different parsers.

Geography — United Kingdom: England, Scotland, Wales and Northern Ireland, contributed by central government and local authorities alike. District-level publishers matter most for leisure work, because facility and open-space registers are maintained at borough scale, not nationally.

Temporal — a current-catalogue view: 227 pages of Directory results ordered newest-published-first, with the historical pre-migration catalogue reported well above today's indexed total. Each entry carries its own period — some registers turn over quickly, some statistical releases run years behind — so read currency per dataset, never per portal.

Granularity — one card per dataset, roughly twenty cards per result page. Beneath the card level, individual datasets typically resolve to local-authority boundaries or point coordinates: an open-space polygon layer in one entry, a set of monitoring-tube locations in the next.

API, files, or your warehouse. Daily, weekly, or hourly.

Your cadence is your call regardless of what the publishing councils do upstream. A scheduled warehouse load keeps a multi-borough register in sync without anyone babysitting a pipeline; flat files suit the one-off mapping project. Every delivery ships the complete five-field dictionary above, the sample rows, and the coverage profile scoped to the publishers and topics you named.

• Multi-council facility mapping — assemble borough-by-borough views of open space, parks and playgrounds from individually published registers, normalised through one shared metadata schema.

• Site screening and catchment analysis — overlay open-space polygons onto your own catchment geographies to quantify provision gaps before capital is committed.

• Local-authority monitoring — track which councils publish what, and catch new registers as they surface in the newest-first result order.

• Regulatory context layers — air-quality points and tree preservation orders give facility and development analyses the statutory backdrop they usually lack.

• Catalogue-wide discovery — 4,540 entries across 227 pages amount to a census of who publishes what in UK local government, useful for scoping any public-data landscape study.

• Citation-grade sourcing — every entry carries a named public body, so figures survive diligence, planning inquiries and peer review.

Market researchers and consultants sizing UK local markets get council-scale provision data for catchment models — see market researchers leisure facilities use cases. Data scientists and ML engineers get a clean metadata schema that turns catalogue discovery into a repeatable join — see data scientists leisure facilities use cases. Developers building data products get stable titles and publisher keys to hang scheduled loads on — see developers builders leisure facilities use cases. Journalists, academics and students get named-publisher provenance for every claim about local provision — see journalists academics leisure facilities use cases.

• OS Open Greenspace — Great Britain's surveyed greenspace geometry, the authoritative complement to council self-published registers.

• Sport England Active Places Power — facility-site detail for England that goes deeper than any single district publishes.

• OpenActive Open Opportunity Data — bookable activity sessions, the demand-side twin of static facility registers.

• BEA ORSA vs the National Data Library — the head-to-head on when a national spending account beats a discovery catalogue.

• Greenspace data — the vocabulary, defined once.

• data.gov.uk source profile — the publisher behind the portal and its neighbouring products.

• Greenspace map data guide — a worked read on turning these layers into finished maps.