 Partner notification involves informing the sexual partners of someone with a sexually transmitted infection of the possibility of exposure, offering them diagnosis and treatment, and providing advice about preventing future infection. In the United Kingdom, this is usually done by specialist sexual health advisers in departments of genitourinary medicine. The effectiveness of partner notification in non-specialist settings in developed countries is not known. We conducted a randomised controlled trial to compare the effectiveness of practice nurse-led partner notification with referral to a genitourinary clinic for partner notification conducted by a specialist health adviser, and to compare the resources used by each strategy. 