{
  "query": {
    "country": "GB",
    "item": "eggs"
  },
  "status": "ok",
  "price": {
    "currency": "GBP",
    "unit": "per pack of 12",
    "value": 3.4,
    "measure": "median",
    "median": 3.4,
    "typical_low": null,
    "typical_high": null,
    "min": null,
    "max": null
  },
  "sample_size": null,
  "period": {
    "from": "2026-08-01",
    "to": "2026-08-31"
  },
  "confidence": "high",
  "price_type": "official_statistic",
  "statistic": {
    "measure": "median",
    "reference_period": "2026-08",
    "note": "ONS labels these official statistics in development. They describe the prices used to calculate CPI (retailer scanner data, about half of the grocery market, plus local price collection), not every price in the market, and ONS advises against comparing months."
  },
  "as_of": "2026-10-14T21:15:40.761Z",
  "source": {
    "id": "gb-ons-price-levels",
    "name": "Consumer prices: price level distributions of grocery products",
    "publisher": "Office for National Statistics (ONS)",
    "licence": "Open Government Licence v3.0. The ONS terms say: \"Most content on this website is subject to Crown copyright protection and is published under the Open Government Licence (OGL). Some content is exempt from the OGL – check the list of exemptions. Reproduction of information is subject to the terms of the OGL and the UK Government Licensing Framework.\" The OGL v3.0 lets you \"exploit the Information commercially and non-commercially for example, by combining it with other Information, or by including it in your own product or application\", and asks that you acknowledge the source, by default with: \"Contains public sector information licensed under the Open Government Licence v3.0.\" The dataset's own page declares the OGL v3.0.",
    "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
    "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: Office for National Statistics, Consumer Prices Price Level Distributions Microdata (official statistics in development), https://www.ons.gov.uk/economy/inflationandpriceindices/datalist . Figures are passed on as published; ProofPrice is not endorsed by the ONS.",
    "url": "https://www.ons.gov.uk/economy/inflationandpriceindices/datalist"
  },
  "method": "The Office for National Statistics publishes each month the prices behind its consumer price index for about 200 grocery product types, as summaries per product and pack size: the weighted median, mean, lower and upper quartile, lowest and highest price, for the whole UK and for 12 regions and nations. The prices come from price collectors in shops and online combined with retailer scanner data. ProofPrice copies the file once a day and returns the published median for the newest month, unchanged, with the other published statistics alongside. ONS publishes no count of observations (it withholds any figure with fewer than ten) and advises against comparing months, so there is no change on a year earlier. These are shelf prices used for the index, not receipts.",
  "method_url": "https://proofprice.com/method",
  "summary": "In the United Kingdom the median shop price of \"Free-range eggs, pack of 12\" was £3.40 in August 2026 (half of the prices ran from £2.98 to £4.20; mean £3.53; ONS consumer price index data from price collectors and retailer scanner data, not receipts). ONS advises against comparing these monthly figures with other months, so no change on a year earlier is given. Official median published by Office for National Statistics (ONS) for 2026-08.",
  "notice": "Information, not a valuation or offer. Ranges describe past recorded prices.",
  "extra": {
    "country_name": "United Kingdom",
    "area": {
      "code": "ALL",
      "name": "United Kingdom"
    },
    "item": {
      "ons_product_type": "EGGS - FREE-RANGE",
      "definition": "Free-range eggs, pack of 12",
      "pack": "pack of 12",
      "unit": "per pack of 12",
      "asked_for": "eggs"
    },
    "what_this_is": "Weighted summary of the shop prices ONS uses to calculate CPI for this product type: local price collection (in shops and online) combined with retailer scanner data. Not a receipt and not the price at any one shop.",
    "reference_month": "2026-08",
    "reference_month_label": "August 2026",
    "statistics": {
      "median": 3.4,
      "mean": 3.5331,
      "lower_quartile": 2.98,
      "upper_quartile": 4.2,
      "lowest": 2.49,
      "highest": 7.3,
      "note": "Lower and upper quartile are the 25th and 75th percentiles: half of the weighted prices lie between them. Lowest and highest are after ONS removed outliers."
    },
    "observations": "At least 10 (ONS withholds any figure with fewer than 10 observations). The exact number is not published.",
    "change_on_year_earlier": null,
    "change_on_year_earlier_unavailable": "ONS says its monthly price-level files should not be used for direct comparisons between months, because the mix of products, retailers and transaction volumes changes. For the change in prices over a year, see ONS consumer price inflation statistics.",
    "other_areas": [
      {
        "area": "North West England",
        "code": "E12000002",
        "median": 3.3,
        "mean": 3.1636
      },
      {
        "area": "Yorkshire and the Humber",
        "code": "E12000003",
        "median": 3.3,
        "mean": 3.604
      },
      {
        "area": "East Midlands",
        "code": "E12000004",
        "median": 3.35,
        "mean": 3.34
      },
      {
        "area": "West Midlands",
        "code": "E12000005",
        "median": 3.4,
        "mean": 3.609
      },
      {
        "area": "East of England",
        "code": "E12000006",
        "median": 3.3,
        "mean": 3.5108
      },
      {
        "area": "London",
        "code": "E12000007",
        "median": 3.38,
        "mean": 3.6
      },
      {
        "area": "South East England",
        "code": "E12000008",
        "median": 3.3,
        "mean": 3.4863
      },
      {
        "area": "South West England",
        "code": "E12000009",
        "median": 3.4,
        "mean": 3.3418
      },
      {
        "area": "Scotland",
        "code": "S99999999",
        "median": 3.3,
        "mean": 3.6075
      }
    ],
    "other_definitions": [],
    "ons_cautions": [
      "Official statistics in development, not Accredited Official Statistics.",
      "Regional figures describe prices within the region and do not add up to the national figure (ONS notes 15 and 16).",
      "The mean here is not comparable with the average prices in the ONS Shopping Prices Comparison Tool (note 18).",
      "Quartiles, lowest and highest are likely to be biased as population measures because the data were designed to measure inflation (notes 20 and 21)."
    ],
    "dataset": {
      "name": "ONS Consumer Prices Price Level Distributions Microdata",
      "url": "https://www.ons.gov.uk/economy/inflationandpriceindices/datalist"
    }
  },
  "answer_id": "ans_51fbfc4cc944a8563d50",
  "method_version": "1",
  "retrieved_at": "2026-10-14T21:15:40.762Z",
  "evidence": {
    "type": "official_statistic",
    "label": "Official published median",
    "meaning": "One average or median that a statistics office or regulator publishes for a reference period: it describes a group, not a distribution, and says nothing about any single price."
  }
}