For fifty years Private Eye has pretty much in most issues exposed a miscarriage of justice, and a lot of them have been murders. Over the years, large numbers of these cases have been found to be entirely wrong, and the men convicted — almost always men, there was a couple of women — have been found innocent, so we would have killed those people, and in some of those very high profile cases which involved terrorism cases, we would have made very dangerous new martyrs by executing people who turned out not to have committed the murders involved. So on a purely practical basis, whatever you think it says about the civilised nature of your society or not, I think it would be incredibly dangerous to have capital punishment back.
On capital punishment in the United Kingdom. Question Time, BBC, 22 September 2011.