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Data sources and quality assurance

Sources and quality assurance of data available in reports.


Data processing and analytical methods used in reporting.

Using data and dashboards on TDI

Helpful 'How to' guides to assist in getting the most out of the reports available on TDI.

Official statistics information

Content, release timetable and changes affecting the publications

Glossary of terms and definitions

Glossary of terminology and definitions used in reports.