He absolutely needs to be put on a note. He's one of the most important persons we've ever had grace our country, and with the help of a few other honourable Brits, and some extremely bright Poles helped secure the world we now live in.

Consider the fact that he was treated dreadfully after the war, and that the vast majority of our country would probably think Simon Cowell is more significant, we need to celebrate Alan Turing. Hopefully the first steps to another Age of Enlightenment.