Guidance and research

This directory contains resources, reference information and research articles that can help you with all aspects of your analytical work.

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Published: 4 March 2026

Adolygiad o’r safon wedi’i chysoni ar gyfer ethnigrwydd: meini prawf gwerthuso a ddefnyddir ar gyfer opsiynau ymateb ychwanegol yn y safon newydd

Harmonisation standards and guidance

Welsh translation of the publication 'Review of the ethnicity harmonised standard: evaluation criteria that will be used for additional response options in the new standard'.

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Published: 4 March 2026

Review of the ethnicity harmonised standard: evaluation criteria that will be used for additional response options in the new standard

Harmonisation standards and guidance

This publication sets out the evaluation criteria to be used in the consultation on user needs for additional response options in a future ethnicity standard. It also sets out the evaluation framework and evidence that will be provided when proposing the new ethnicity question.

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Published: 19 September 2025

Review of the ethnicity harmonised standard: findings from the review of ‘write-in’ responses

Harmonisation standards and guidance

A summary of the key methods and findings that inform potential updates to the harmonised ethnicity standard.

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Published: 19 June 2025

Review of the ethnicity harmonised standard: overview of our redesign research to date

Harmonisation standards and guidance

A summary of the research undertaken to inform the development of a more inclusive and flexible question format for the ethnicity harmonised standard.

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Published: 6 December 2024

Review of the ethnicity harmonised standard: additional work to explore potential new response options

Guidance, Harmonisation standards and guidance

This update provides an overview of the GSS Harmonisation team’s review of the ethnicity harmonised standard. It sets out additional work they are undertaking to further understand user need and explore potential new tick-box response options.

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Published: 24 July 2023

Review of ethnicity harmonised standard: findings from phase 2 of our research

Report

This report summarises the main findings from the second phase of the work to review the current ethnicity harmonised standard.

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Published: 9 March 2023

Review of ethnicity harmonised standard: findings from phase 1 of our research

Harmonisation standards and guidance, Report

This report presents the first phase of work by the Government Statistical Service (GSS) to review the current ethnicity harmonised standard.

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Published: 13 August 2021

Ethnicity harmonised standard

Harmonisation standards and guidance

This guidance sets out how to collect and report statistics about ethnicity to ensure statistics about this topic are as comparable as possible across government.

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