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Rhyddhawyd ar: 27 October 2025
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Methodoleg
Quality and methodology Information for Unexplained deaths in infancy: England and Wales, detailing the strengths and limitations of the data, methods used and data uses and users.
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Rhyddhawyd ar: 24 September 2025
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Methodoleg
Information on strengths and limitations of the data, quality characteristics, users and uses of the data, how the output was created, accessibility, and characteristics.
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Rhyddhawyd ar: 12 April 2021
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Methodoleg
Quality and methodology information for Compliance with coronavirus (COVID-19) guidance, detailing the strengths and limitations of the data, methods used, and data uses and users.
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Rhyddhawyd ar: 25 February 2019
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Methodoleg
Quality and Methodology Information for deaths of homeless people in England and Wales – local authority level data, detailing the strengths and limitations of the data, methods used and data uses and users.
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Rhyddhawyd ar: 09 November 2018
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Methodoleg
Quality and Methodology Information for Index of Private Housing Rental Prices, detailing the strengths and limitations of the data, methods used and data uses and users.
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Rhyddhawyd ar: 23 November 2023
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Methodoleg
Details the strengths, limitations, uses, users and methods used for Census 2021, England and Wales.
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Rhyddhawyd ar: 21 October 2025
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Methodoleg
Quality and methodology information (QMI) for annual mid-year population estimates of the very old, including centenarians. Includes strengths and limitations, methods, and data uses and users.
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Rhyddhawyd ar: 19 August 2024
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Methodoleg
Quality and Methodology Information (QMI) report for environmental protection expenditure accounts estimates, detailing the strengths and limitations of the data, methods used, and data uses and users.
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Rhyddhawyd ar: 09 October 2023
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Methodoleg
Quality and Methodology Information for energy efficiency of housing estimates for England and Wales, detailing the strengths and limitations of the data, methods used, and data uses and users.
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Rhyddhawyd ar: 02 February 2023
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Methodoleg
Quality and methodology information for the annual estimates of the value and types of non-financial assets used in the production of goods or services within the UK economy and their loss in value over time. This page has been superseded.