Not wanting to nitpick, but shouldn't we be apologizing for his persecution, rather than his prosecution? Homosexual sex was illegal at the time, and his prosecution seems fair even if the law was not. Many others fell foul of this law, and to apologize solely to Turing because he was a war hero and a genius of the first order seems rather unjust. I find the story of Turing's subsequent persecution - the inhumane chemical castration and his treatment at the hands of an institutionally bigoted civil service - far more disturbing. Homosexual acts are no longer illegal, but this kind of institutional prejudice and bullying is still very much a problem.