A government minister in the Ministry of Justice, Lord McNally, in response to a question from Lord Sharkey on Thursday 2nd February 2012 made a statement in the House or Lords that “a posthumous pardon [for Alan Turing] was not considered appropriate”.
The statement acknowledges that the offence of which Turing was convicted “now seems both cruel and absurd” but says that Turing “would have known that his offence was against the law and that he would be prosecuted”. This says that the:
long-standing policy has been to accept that such convictions took place and, rather than trying to alter the historical context and to put right what cannot be put right, ensure instead that we never again return to those times.
Back when the pardon petition was launched in November 2011, John Graham-Cumming, the man responsible for the Turing apology petition in 2009, wrote a blog post explaining why he did not support the pardon petition: Why I’m not supporting the campaign for a pardon for Alan Turing (26 November 2011).
On the Math/Maths Podcast this week Samuel Hansen spoke convincingly about a pardon, above an apology, as having the effect of removing the conviction, not merely apologising for it. Graham-Cumming points to the Protection of Freedoms bill, currently passing through the House of Lords, which:
specifically allows for the disregarding of convictions under the old law that was used against Turing. Once disregarded the law causes their convictions to be deleted. It’s not quite the same thing as a pardon, but its effect is to lift the burden of a criminal record from these living men [those who are "still hurt by that law"].