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      "address_path": "w1u/chiltern-street/portman-mansions/flat-14b",
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      "address_path": "w1u/chiltern-street/portman-mansions/flat-14b",
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      "address_path": "w1u/chiltern-street/portman-mansions/flat-14b",
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      "url": "https://openproperties.uk/w1u/chiltern-street/portman-mansions/flat-14b/d809916a-9f4b-46da-998d-835577c34dde",
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      "district": "CITY OF WESTMINSTER",
      "county": "GREATER LONDON",
      "ppd_category_type": "A",
      "last_seen_at": "2026-07-09T18:56:26.350736+00:00",
      "address_path": "w1u/chiltern-street/portman-mansions/flat-14b",
      "property_url": "https://openproperties.uk/w1u/chiltern-street/portman-mansions/flat-14b"
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    {
      "url": "https://openproperties.uk/w1u/chiltern-street/portman-mansions/flat-14b/11efffec-d032-4de7-ba30-a1eac77e465c",
      "transaction_id": "11EFFFEC-D032-4DE7-BA30-A1EAC77E465C",
      "price": 84000,
      "date_of_transfer": "1995-10-27",
      "postcode": "W1U 6NX",
      "property_type": "F",
      "property_type_display": "Flat/maisonette",
      "new_build": false,
      "duration": "L",
      "duration_display": "Leasehold",
      "paon": "PORTMAN MANSIONS",
      "saon": "FLAT 14B",
      "street": "CHILTERN STREET",
      "locality": "LONDON",
      "town_city": "LONDON",
      "district": "CITY OF WESTMINSTER",
      "county": "GREATER LONDON",
      "ppd_category_type": "A",
      "last_seen_at": "2026-07-09T18:56:26.350736+00:00",
      "address_path": "w1u/chiltern-street/portman-mansions/flat-14b",
      "property_url": "https://openproperties.uk/w1u/chiltern-street/portman-mansions/flat-14b"
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  ],
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains HM Land Registry data © Crown copyright and database right. This data is licensed under the Open Government Licence v3.0. Contains OS data © Crown copyright and database right. Postcode locations are Code-Point Open centroids: they locate the postcode, not an individual building.",
  "provenance": [
    {
      "source": "HM Land Registry Price Paid Data",
      "source_url": "https://www.gov.uk/government/statistical-data-sets/price-paid-data-downloads",
      "retrieved_at": "2026-07-09T18:56:26.350736+00:00"
    },
    {
      "source": "OS Code-Point Open",
      "source_url": "https://osdatahub.os.uk/downloads/open/CodePointOpen",
      "retrieved_at": null
    }
  ]
}