British Association for Sexual Health and HIV
Professional representative body for those practicing sexual health including the management of STIs and HIV in the UK; contains a profile, details of special interest groups, and resources on education and training.
Brook - STIs
An advice and information resource on STIs, with details of their free confidential helpline for under 25s, and a listing of local centres.
The Guardian's news section covering the most common sexually transmitted disease in Britain.
Health Protection Agency
Provides brief guides to STIs (Sexually Transmitted Infections) and further resources, with annual data tables on their prevalence.
National Chlamydia Screening Programme
Provides useful information, advice, and a FAQ, particularly for sexually active young people under 25 with a listing of local chlamydia screening services; also includes a section for health professionals.