Published in the Times on 26 July 2013:
Many arguments have been raised by your recent correspondents concerning Alan Turing, but the nub of the case can be stated simply. Turing was not wrongly convicted because he was a genius; he was wrongly convicted because his actions should never have been a crime in the first place. His conviction would have been equally unjust had he been a drunken layabout instead of a national hero.
There is no need for a retrospective pardon, because Parliament has already made clear that Turing and others should not have been convicted, by repealing the relevant offence, and by the passage of various equality laws in recent years.