Royston re
"Tell the hundreds of white British that get infected every year through heterosexual vaginal sex that "there is no risk of straight HIV" and see what their opinion is"

Reports indicate that 21 115 adults (aged 15 or older) diagnosed with HIV in England, Wales, and Northern Ireland between 1985 and 2003 were infected through heterosexual intercourse (figure). Of these, 1901 (9.0%) were probably infected in the United Kingdom:

That from the BMJ piece discussed earlier.
That is an average of 158.4 per year.
About two and a half times the number struck by lightning!