I'm very well aware that the twat was talking about being unaware of infection.

Which feeds directly into my later comment about MSMs representing the highest take up (proportionally) of testing, while heteros are vastly under reported.

What does that do to your biased figures?

You simply don't know whether hetero infections are rising or falling year on year. You only know that numbers tested are actually much lower (proportionally) and that leaves your prejudiced assessments swinging in the breeze.