In 2007 the Health Protection Agency (HPA) announced that the number of newly diagnosed HIV infections amongst gay men had risen for the third successive year, to an all time high.18 In 2010 sex between men accounted for 2,363 new HIV diagnoses, representing 39 per cent of new diagnoses that year.19 By the end of 2009, the number of MSM living with HIV in the UK was estimated at 35,000.20 An estimated four out of five probably acquired their infection in the UK.21 However, around 9,000 MSM living with HIV in the UK are unaware that they are infected.
The level of HIV infection caused by injecting drug use is relatively low in the UK; around 1.8 percent of all new HIV diagnoses in 2010 were attributed to injecting drug use. Just over a third of these infections were definitely acquired within the UK. By the end of December 2010 injecting drug use accounted for 5 percent of HIV diagnoses ever reported in the UK.
http://www.avert.org/aids-uk.htm
So when it comes to AIDS levels among populations it seems that homosexuality has a much larger risk than intravenous drug users.
Heterosexuals make up half the rate but as others have said its mostly immigrants from Africa( why they wouldn't be screened for this is another matter entirely). Plus there are a lot more straight people than gay, so per capita the rate is much higher among gays.
Time for hype
