UK government declines to pardon Alan Turing
Whilst my gut reaction would be that this is the wrong decision, this - "However, the law at the time required a prosecution and, as such, 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." - is actually a rational and convincing response.