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    },
    {
      "paon": "35",
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      "url": "https://openproperties.uk/w2/northumberland-place/35"
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    {
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    },
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      "url": "https://openproperties.uk/w2/northumberland-place/39"
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      "url": "https://openproperties.uk/w2/northumberland-place/42"
    },
    {
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      "url": "https://openproperties.uk/w2/northumberland-place/43"
    },
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      "paon": "44",
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      "url": "https://openproperties.uk/w2/northumberland-place/44"
    },
    {
      "paon": "45",
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      "first_sale_date": "2000-01-07",
      "last_sale_date": "2022-02-28",
      "last_price": 5000000,
      "url": "https://openproperties.uk/w2/northumberland-place/45"
    },
    {
      "paon": "51",
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      "url": "https://openproperties.uk/w2/northumberland-place/51"
    },
    {
      "paon": "52",
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      "last_sale_date": "2025-09-30",
      "last_price": 6075000,
      "url": "https://openproperties.uk/w2/northumberland-place/52"
    },
    {
      "paon": "53",
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      "url": "https://openproperties.uk/w2/northumberland-place/53"
    },
    {
      "paon": "54",
      "saon": null,
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      "first_sale_date": "2021-08-06",
      "last_sale_date": "2021-08-06",
      "last_price": 4190000,
      "url": "https://openproperties.uk/w2/northumberland-place/54"
    },
    {
      "paon": "55",
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      "postcode": "W2 5AS",
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      "first_sale_date": "2005-09-15",
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      "last_price": 1392000,
      "url": "https://openproperties.uk/w2/northumberland-place/55"
    }
  ],
  "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.",
  "provenance": {
    "source": "HM Land Registry Price Paid Data",
    "source_url": "https://www.gov.uk/government/statistical-data-sets/price-paid-data-downloads",
    "retrieved_at": null
  }
}