National Down Syndrome Cytogenetic Register
- Information about an anonymous register allowing researchers to analyse possible causal factors. Includes interpretation of the results.
- http://www.mds.qmw.ac.uk/wolfson/ndscr/

Learning about Intellectual Disabilities and Health
- Collaboration between the Down's Syndrome Association and St George's Hospital Medical School, University of London, has produced an information resource, with particular emphasis on the ability of medical professions to empower their patients.
- http://www.intellectualdisability.info/

Down Syndrome Research Foundation
- A parent-based charity supporting research into the medical conditions collectively called Down's syndrome. Information on research, nutrition education, health care guidelines, and alternative therapies. Includes parents' stories.
- http://www.dsrf.co.uk/

Down's Syndrome Medical Interest Group
- Information for healthcare professionals, including UK-specific growth charts, guidelines, and medical information library.
- http://www.dsmig.org.uk/