BCS70 Age 26 Sweep

Sweep details

Dates April 1996 – September 1996
Age 26
Achieved sample 9,003 (cohort members)
Respondents Cohort members
Fieldwork agency MORI
Survey mode Postal
Data access

Main dataset available via the UK Data Service [SN 3833]. Visit the UK Data Service website to access the data.


The Age 26 Sweep was the first adult follow-up of BCS70. A paper questionnaire was posted to cohort members covering: qualifications and training, employment, relationships, children, physical and mental health, drinking, smoking, voting, attitudes and values, life satisfaction.

Special features at age 26

Attitudes and values

The Age 26 Sweep sought cohort members’ views on a range of topics including gender equality, politics and unemployment.

Many of the same questions have been repeated in later sweeps of the study (at 30 and 42) and have also been included in NCDS (at 33 and 42), providing an opportunity to show that attitudes and values may change over time and between generations.


  • User guides
  • Questionnaires
  • Technical reports
  • Data notes
  • Additional
User guides

Handling missing data in the CLS cohort studies – User Guide

This user guide aims to describe and illustrate a straightforward approach to missing data handling, while detailing some more general considerations around missing data along the way.

Date published: 03/06/2024
PDF: 1000,62 KB


BCS70 Age 26 Guide to the Data

Guide to the 26 year follow up for BCS70

Date published: 01/05/1996
PDF: 972,61 KB


BCS70 Partnership Histories (1986-2013) Guide

Date published: 01/10/2016
PDF: 370,43 KB


BCS70 Activity Histories (1986-2013) Guide

Date published: 01/07/2017
PDF: 660,51 KB


BCS70 Age 26 Annotated Questionnaire

Annotated version of the questionnaire from BCS Age 26 sweep

Date published: 01/05/1996
PDF: 97,05 KB

Technical reports

No material of this type is available.

Data notes

No material of this type is available.


Deriving highest qualification in NCDS and BCS70

This Data Note explains the derivation of variables on Highest Educational Qualification obtained by cohort members in the National Child Development Study (NCDS) and the 1970 British Cohort Study (BCS70).

Date published: 01/01/2011
PDF: 514,11 KB


BCS70 Revised Region Variables (Third Edition)

This User Guide accompanies the deposits at the UK Data Archive of derived variables for each sweep of BCS70. These derived variable datasets are found under the study number for each of the sweeps and include variables for country of interview, region and government office regions.

Date published: 01/02/2014
PDF: 307,78 KB


BCS70 Ethical Review and Consent

Review of Ethical procedures used for each Sweep of BCS70.

Date published: 01/01/2019
PDF: 4,18 MB

Contact us

Centre for Longitudinal Studies
UCL Social Research Institute

20 Bedford Way
London WC1H 0AL

Email: clsdata@ucl.ac.uk

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