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The Census 2021 Data Asset high-level design: exploring the feasibility of maintaining an anonymised person-level longitudinal data source based on Census 2021.

A guide to using country of birth, nationality, and passports held data and statistics. Including definitions of each measure, how these are collected in different data sources and how best to use international migration statistics based on these measures.

Methods used to link refugee data to various administrative data in a pilot study led by the Office for National Statistics (ONS) and the Home Office.

An introduction to the main concepts that underpin international migration statistics, including answers to frequently asked questions.

Quality and Methodology Information for population of the UK by country of birth and nationality, detailing the strengths and limitations of the data, methods used, and data uses and users.

Quality and Methodology Information for local area migration, detailing the strengths and limitations of the data, methods used, and data uses and users.

A summary of the current methods in using the administrative data source the Registration and Population Interaction Database (RAPID) from the Department for Work and Pensions in estimating international migration.

In-depth look at methodology of both Long-Term International Migration (LTIM) and the International Passenger Survey (IPS), including preliminary adjustments, assumptions made for variables, and changes over time.

Understanding the reliability and accuracy of Long-Term International Migration estimates, including sampling distribution, sampling error, statistical significance and confidence intervals.

Estimates of Short-Term International Migration to and from the UK for England and Wales, by reason for migration, age, sex and citizenship.