{"schemaVersion":"1.0","id":"what-moves-through-the-gateways","dataset":"trade-by-port","title":"What moves through the gateways","description":"By value, Heathrow is one of Britain's biggest ports.","methodology":"Declared value of goods through London's ports, monthly, from HMRC's Overseas Trade Statistics: Heathrow, London and Tilbury, and London Gateway. Goods only — London's economy exports services, which are invisible here. Heathrow dominates because what flies is small and expensive. City Airport is in HMRC's port list and is deliberately absent: it reports effectively no goods, and a flat line at zero is noise wearing the clothes of information.","category":"money","categoryLabel":"Money","cadence":"monthly","placeholder":false,"landingPage":"https://londongraph.com/g/what-moves-through-the-gateways","markdown":"https://londongraph.com/g/what-moves-through-the-gateways/index.html.md","source":{"name":"HMRC uktradeinfo","url":"https://www.uktradeinfo.com/","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"},"updatedAt":"2026-09-16T03:39:47.192Z","release":{"label":null,"publishedAt":null,"resourceUrl":null,"methodologyUrl":null,"sha256":null},"observations":[{"series":"Heathrow","buckets":["2024-07","2024-08","2024-09","2024-10","2024-11","2024-12","2025-01","2025-02","2025-03","2025-04","2025-05","2025-06","2025-07","2025-08","2025-09","2025-10","2025-11","2025-12","2026-01","2026-02","2026-03","2026-04","2026-05","2026-06","2026-07"],"values":[14120.3,15561.5,17061.8,24349.1,25357,24155.6,28626.4,28729.5,24236.8,22768.8,20828,23038.4,23875,15794.5,21691.8,26498.2,24806.1,31857.9,29502.5,26777.8,32725.6,25242.3,28127.8,26345.7,26435.9],"unit":"£m of goods","metadata":[{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{}]},{"series":"London and Tilbury","buckets":["2024-07","2024-08","2024-09","2024-10","2024-11","2024-12","2025-01","2025-02","2025-03","2025-04","2025-05","2025-06","2025-07","2025-08","2025-09","2025-10","2025-11","2025-12","2026-01","2026-02","2026-03","2026-04","2026-05","2026-06","2026-07"],"values":[3218.8,2886.9,2876.9,3293.4,3160.1,2646.6,2617.8,2816.8,3163.5,2851,3117.9,2946.9,3341.6,3079.3,2984.6,3267.7,3126.1,2930.4,2632.8,2909.6,3481.7,3569.6,3612.3,3347.1,3497.8],"unit":"£m of goods","metadata":[{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{}]},{"series":"London Gateway","buckets":["2024-07","2024-08","2024-09","2024-10","2024-11","2024-12","2025-01","2025-02","2025-03","2025-04","2025-05","2025-06","2025-07","2025-08","2025-09","2025-10","2025-11","2025-12","2026-01","2026-02","2026-03","2026-04","2026-05","2026-06","2026-07"],"values":[2500.4,2318.9,2610.2,2696.8,3031.8,2244.9,2639.1,2292.4,2713.7,3316,3279.3,2905.8,3150.7,3085.8,3230.5,3395.1,3114.5,3054,2662.9,2953.5,3302.5,2945.2,3518.4,3128.7,3521.8],"unit":"£m of goods","metadata":[{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{}]}],"areaStatistics":null,"visualizations":[{"id":"overview","label":"Trend","description":"By value, Heathrow is one of Britain's biggest ports.","url":"https://londongraph.com/g/what-moves-through-the-gateways","renderer":"primary","default":true,"timeControl":"inherit","datasets":[],"transform":null,"controls":null,"metrics":[],"caveat":null},{"id":"small-multiples","label":"Small multiples","description":"Give each series its own aligned panel.","url":"https://londongraph.com/g/what-moves-through-the-gateways?view=small-multiples","renderer":"small-multiples","default":false,"timeControl":"inherit","datasets":[],"transform":null,"controls":null,"metrics":[],"caveat":null},{"id":"change","label":"Change","description":"Show the change from each preceding published period.","url":"https://londongraph.com/g/what-moves-through-the-gateways?view=change","renderer":"delta","default":false,"timeControl":"inherit","datasets":[],"transform":null,"controls":null,"metrics":[],"caveat":null},{"id":"share","label":"Share over time","description":"Normalize each period to show how the mix changes.","url":"https://londongraph.com/g/what-moves-through-the-gateways?view=share","renderer":"share-trend","default":false,"timeControl":"inherit","datasets":[],"transform":null,"controls":null,"metrics":[],"caveat":null}],"availability":"observations","note":"The release is complete for the measures represented on the graph page."}