Homosexual men are requesting a controversial "sex disease" vaccine designed to prevent a female cancer.

Gardasil protects against the most common of sexually transmitted infections, human papillomavirus (HPV), which can cause cervical cancer.

But HPV also causes genital warts and anal and penile cancer, and men argue the jab would guard against these.

Many private clinics are offering it to men. One in London says it has immunised dozens in the last six weeks.