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  • Support available for the Integrated Data Service

    Released on: 31 August 2023 | Corporate Information

    Learn about the support available during the transition from the Secure Research Service (SRS) to Integrated Data Service (IDS).

  • Changes to the Wealth and Assets Survey weighting system because of a shift in the reporting period

    Released on: 6 July 2020 | Methodology

    The new weighting scheme for the Wealth and Assets Survey and the computation of the different types of cross-sectional and longitudinal weights produced during a reporting period.

  • Online

    Released on: 5 August 2025 | Corporate Information

    Information for young people and young adults taking part in the Safety During Childhood Survey online pilot. You will have received a letter through the post.

  • User guide to marriage statistics

    Released on: 18 November 2025 | Methodology

    Supporting information on the data used in our published marriage tables, which provide statistics on marriages that took place in England and Wales during the latest available data year.

  • International Passenger Survey: quality information in relation to migration flows

    Released on: 23 August 2018 | Methodology

    This background note provides an overview of the quality of the International Passenger Survey (IPS) for estimating international migration flows and has been updated following additional work carried out during 2017. This includes the implementation of electronic questionnaires on tablets to replace the current paper questionnaires, an out-of-hours pilot, and a comparison of how other countries measure long-term immigration.

  • Data collection changes due to the pandemic and their impact on estimating personal well-being

    Released on: 4 February 2021 | Methodology

    During the coronavirus (COVID-19) pandemic, the Office for National Statistics has published estimates of personal well-being using both the Annual Population Survey and the weekly module of the Opinions and Lifestyle Survey. This methodology article considers the impact that the pandemic has had on data collection, how this has influenced estimates of personal well-being and the comparability of these estimates.

  • Labour Force Survey: the impact of using an alternative imputation method on main labour market estimates

    Released on: 24 October 2022 | Methodology

    Labour Force Survey (LFS) person-weighted datasets use a roll-forward imputation method. During the coronavirus (COVID-19) pandemic an alternative imputation method that might better cope with the unprecedented labour market circumstances was explored. This article highlights the impact of using this alternative method on main labour market estimates over the periods between January to March 2018 and June to August 2022.

  • Gross Domestic Product (GDP)

    Topic

    Gross domestic product (GDP) estimates are the main measure of UK economic growth based on the value of goods and services produced during a given period. GDP estimates are produced monthly, quarterly and annually as part of the revisions cycle to ensure the timely release of data throughout the year. Our GDP monthly estimate consists of output data and is our most timely official estimate of economic growth. The two publication stages for quarterly estimates are our GDP first quarterly estimate and our quarterly national accounts, which include data on output, expenditure and income.