{"provenance":{"source":"NHS England, Emergency Care Dataset (ECDS) performance by site, experimental statistics","source_url":"https://www.england.nhs.uk/statistics/wp-content/uploads/sites/2/2026/10/ECDS_Performance_Provisional_Sep_2026-10-05_122900_Z71L3J.xlsx","licence":"Open Government Licence v3.0","as_of":"2026-09"},"department":{"site_code":"RQM01","name":"Chelsea and Westminster Hospital","slug":"chelsea-and-westminster-hospital","postcode":"SW10 9NH","lat":51.484309,"lon":-0.18162,"district":"Kensington and Chelsea","specialist_unit":false,"trust_code":"RQM","trust":"Chelsea and Westminster Hospital NHS Foundation Trust","trust_page":"https://checkwaitingtimes.co.uk/hospital/chelsea-and-westminster-hospital-nhs-foundation-trust"},"month":{"attendances":4775,"over_4_hours":1625,"share_within_4_hours":0.6597,"note":null},"live":null,"ambulance":{"provenance":{"source":"NHS England, Ambulance Quality Indicators: Systems Indicators (AmbSYS)","source_url":"https://www.england.nhs.uk/statistics/wp-content/uploads/sites/2/2026/10/AmbSYS-2026-Sep-as6t8.xlsx","licence":"Open Government Licence v3.0","as_of":"2026-09"},"service":"London","code":"RRU","category_1_mean_seconds":424,"category_2_mean_seconds":2010,"category_2_p90_seconds":4230,"handover_share_over_30_min":0.3056}}