The number of gay and bisexual men being diagnosed with HIV in Britain reached an all-time high in 2011, according to the Health Protection Agency (HPA)

It said that there had been a worrying trend since 2007, with more and more new cases each year. Nearly half of the 6,280 people diagnosed in 2011 were men who had sex with other men (MSM). Overall, one in 20 MSM are infected with HIV. Of those diagnosed in 2011, nearly two-thirds had not been to a sexual health clinic in the previous three years. The total number of people living with HIV in Britain rose to 96,000, up from 91,500 the previous year. The issue is most intense in London. The data suggests that one in four people with HIV are completely unaware of the infection, meaning they cannot receive treatment and may still be spreading the virus.