Here you will find all the documentation for our studies. This includes survey questionnaires, interviewer instructions, showcards, technical reports, survey reports, and derived variables. For more information, take a look at our guide to the different documentation types.
Showing 431 results.
Survey reports
Early Life Cohort Feasibility Study: Acceptability of administrative data use with parents
This report outlines the findings from the public dialogue workshops, which explored the attitudes of parents of young children to the proposed uses of identifiable and de-identified administrative data in the Early Life Cohort Feasibility Study and their acceptability.
Date published: 15 February 2024
Survey reports
Early Life Cohort Feasibility Study: Acceptability of administrative data use
This report outlines the findings from the stakeholder interviews to the proposed uses of administrative data in the Early Life Cohort Feasibility Study.
Date published: 15 February 2024
Survey reports
Early Life Cohort Feasibility Study: Acceptability of administrative data use activation workshop report
This topline report summarises findings from the Early Life Cohort Feasibility Study stakeholder activation workshop. The purpose of the workshop was to discuss the findings from the stakeholder interviews and public dialogue research conducted in 2021 exploring attitudes towards CLS’ proposed uses of administrative data in the study.
Date published: 14 February 2024
Questionnaires and interviewer instructions
Early Life Cohort Feasibility Study: Final Questionnaire
This document contains the final questionnaire used for the Early Life Cohort Feasibility Study.
This questionnaire was first uploaded in February 2024 and the version for the ELC-FS data deposit was uploaded in August 2025.
Date published: 14 February 2024
Questionnaires and interviewer instructions
Millennium Cohort Study Sweep 8 (Age 23) Resident Partner Questionnaire
Partners of MCS cohort members completed this questionnaire for the Age 23 Sweep.
Date published: 27 November 2023
Questionnaires and interviewer instructions
Millennium Cohort Study Sweep 8 (Age 23) Main Questionnaire
MCS cohort members completed this questionnaire for the Age 23 Sweep.
Date published: 2 November 2023
User guides
MCS Linked education administrative datasets KS1-KS4 – Wales
User guide to Linked education administrative datasets KS1-KS4 – Wales.
Version 2.
Date published: 1 October 2023
Survey reports
MCS8 Qualitative Research Findings
The Child of the New Century (CNC) Study (also known as the Millennium Cohort Study) follows the lives of around 19,000 young people living across England, Scotland, Wales and Northern Ireland. Two stages of qualitative research were carried out to support the design of engagement approaches.
Date published: 15 September 2023
User guides
BCS70 Age 46 Survey User Guide
User guide for the BCS70 age 46 biomedical survey dataset.
Date published: 27 July 2023
Questionnaires and interviewer instructions
Next Steps Age 32 Questionnaire
This questionnaire was given to participants of the Next Steps Age 32 Sweep.
Date published: 25 July 2023
Centre for Longitudinal Studies
UCL Social Research Institute
20 Bedford Way
London WC1H 0AL
Email: clsdata@ucl.ac.uk
