{"id":"7e2f561b-ade6-4345-903a-6052e77120a3","type":"DATASET","name":"Office for National Statistics (ONS) Population Estimates, Borough and Ward","slug":"office-for-national-statistics-ons-population-estimates-borough-and-ward","description":"ONS Mid-year estimates (MYE) of resident populations for London boroughs are available in the following files: Mid-year population by single year of age (SYA) and sex, for each year 1999 to 2014. ONS mid-year estimates data back to 1961 total population for each year since 1961. These files take into account the revised estimates released in 2010. Ward level Population Estimates London wards single year of age data covering each year since 2002. Custom Age Range Tool An Excel tool is available that uses Single year of age data that enables users to select any age range required. ONS policy is to publish population estimates rounded to at least the nearest hundred persons. Estimates by single year of age, and the detailed components of change are provided in units to facilitate further calculations. They cannot be guaranteed to be as exact as the level of detail implied by unit figures. Estimates are calculated by single year of age but these figures are less reliable and ONS advise that they should be aggregated to at least five-year age groupings for use in further calculations, onwards circulation, or for presentation purposes. (Splitting into 0 year olds and 1-4 year olds is an acceptable exception). ONS mid-year population estimates data by 5 year age groups going all the way back to 1981, are available on the 0)","counts_as_coverage":false,"met":false,"reached":false,"criterion":"EXISTS (SELECT 1 FROM entry_data_profiles p WHERE p.entry_id = entries.id AND COALESCE(p.field_count, 0) > 0)"},{"level":"executable","level_index":4,"label":"Executable","meaning":"Queries run through Commodity","evidence":"entries.capability_tier = 'live' — today's proxy for \"queryable through us\"","counts_as_coverage":true,"met":false,"reached":false,"criterion":"entries.capability_tier = 'live'"},{"level":"joinable","level_index":5,"label":"Joinable","meaning":"Canonical identifiers and concepts mapped","evidence":"a field link to a canonical identifier whose sampled VALUES match its format","counts_as_coverage":true,"met":false,"reached":false,"criterion":"EXISTS (SELECT 1 FROM entry_field_links efl WHERE efl.entry_id = entries.id AND efl.identifier_id IS NOT NULL AND efl.value_status = 'match')"},{"level":"reproducible","level_index":6,"label":"Reproducible","meaning":"Snapshots and transformation evidence retained","evidence":"at least one retained evidence manifest (migration 078)","counts_as_coverage":true,"met":false,"reached":false,"criterion":"EXISTS (SELECT 1 FROM evidence_manifests em WHERE em.entry_id = entries.id)"},{"level":"guaranteed","level_index":7,"label":"Guaranteed","meaning":"Monitored against an operational reliability target","evidence":"an active reliability target with a named monitor (migration 096)","counts_as_coverage":true,"met":false,"reached":false,"criterion":"EXISTS (SELECT 1 FROM entry_reliability_targets rt WHERE rt.entry_id = entries.id AND rt.is_active = true)"}],"officialness":{"basis":"catalog_inherited","label":"Inherited from the upstream catalog: this item came from a trusted official government catalog, and that provenance — not per-item proof — is the warrant. Its own proof score is below 80 or it matched no registered institution (apps/worker/src/connectors/catalog/qualify-store.ts).","proof_confidence":null,"proven_threshold":80,"institution_id":"ea368adb-37b1-46ed-83cc-ad0d75bedb83","definition":"CASE WHEN COALESCE(entries.is_public_sector, false) IS NOT TRUE THEN 'not_official' WHEN COALESCE(entries.official_confidence, 0) >= 80 AND entries.institution_id IS NOT NULL THEN 'per_item_proven' ELSE 'catalog_inherited' END"},"source_family":{"key":"data.london.gov.uk","label":"One unit = one source family, approximated by the serving host of the entry's primary source URL (e.g. bdl.stat.gov.pl). A COMPUTED stand-in for the curated families of SCOPE.md §5, which no table holds yet. A family sits at the highest level any of its entries has reached, because a family is integrated to the depth of its deepest working integration. Never compare or combine with the entry reading."},"generated_at":"2026-08-16T16:08:10.574Z"},"api_details":null,"dataset_details":null,"license":null,"reuse":{"license_id":null,"license_name":null,"license_url":null,"commercial_use":{"status":"unknown","value":null},"redistribution":{"status":"unknown","value":null},"attribution_required":{"status":"unknown","value":null},"share_alike":{"status":"unknown","value":null},"personal_data_warning":{"status":"unknown","value":null},"cache_and_mirror":{"status":"unknown","value":null},"undetermined":["commercial_use","redistribution","attribution_required","share_alike","personal_data_warning","cache_and_mirror"],"basis":"unverified","confidence":0.1,"confidence_tier":"low","source_text":null,"source_url":null,"reviewed_at":null},"license_raw":null,"latest_check":{"id":"51d55135-44f2-49f8-a1a5-0d220ef57ab9","entry_id":"7e2f561b-ade6-4345-903a-6052e77120a3","status":"VERIFIED","last_checked_at":"2026-08-16T13:50:46.411Z","p50_latency_ms":828,"p95_latency_ms":null,"last_error":null,"consecutive_failures":0,"created_at":"2026-06-24T18:59:33.320Z","updated_at":"2026-08-16T13:50:46.411Z","consecutive_successes":153,"probe_url":"https://data.london.gov.uk/download/vd615/36295a20-4fea-429c-b26e-ad51e4cfb914/ward-mid-year-estimates-sya-since-2002.xlsx","probe_method":"GET","probe_http_status":200,"probe_content_type":"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet","probe_succeeded_at":"2026-08-16T13:50:46.411Z"},"data_profile":{"id":"a469bad6-ef83-4749-a67b-f730c6391b34","entry_id":"7e2f561b-ade6-4345-903a-6052e77120a3","profile_source":"excel","profile_kind":"dataset","dataset_id":null,"fields":null,"field_count":null,"sample_records":null,"record_count":null,"data_size_bytes":null,"dataset_count":null,"query_examples":null,"status":"error","error_message":"Excel file too large (10061448 bytes)","profiled_at":"2026-07-27T11:13:51.946Z","run_id":"8fa954bb-7df5-4e37-a2b8-2c1851341161","created_at":"2026-07-20T11:02:14.579Z","updated_at":"2026-07-27T17:53:35.297Z","license_raw":null,"license_id":null,"consecutive_failure_count":1,"last_error_at":"2026-07-27T11:13:51.946Z","last_error_message":"Excel file too large (10061448 bytes)","previewable":false},"datasets":[],"limits":[]}