If you intend to re-use or publish Census data a licence is required. Any end-user licence issued under a click-use licence or a distribution licence must contain the terms in the standard conditions of supply.
Crown Copyright
Under HMSO's online licensing scheme, information which has been produced for Government purposes is available for re-use and publication through free 'core click-use' licences available from HMSO's Web site.
The following 1991 Census products are classified as 'core' products. This means that they are available for re-use and publication through free 'click-use' licences:
1991 Small Area Statistics for England/Wales, Scotland, Northern Ireland;
1991 Local Base Statistics for England/Wales, Scotland;
1991 Special Workplace Statistics for England/Wales, Scotland;
1991 Special Migration Statistics for England/Wales, Scotland;
1991 User Guides;
Monitors;
Area Classifications;
Constitutions;
Urban Area Statistics;
Topic/Published Reports;
Glossary.
Other products are treated as value added and further enquiries should be referred to Census Customer Services.