I think that in the case of Denning, he just went on for too long. He should have retired long before he went gahgah. Here is another Denning quote which is sheer wickedness ::
"In the summer of 1990 he agreed to a taped interview with A.N. Wilson, to be published in The Spectator. They discussed the Guildford Four; Denning remarked that if the Guildford Four had been hanged "They'd probably have hanged the right men. Just not proved against them, that's all".[94] His remarks were controversial and came at a time when the issue of miscarriage of justice was a sensitive topic.[95] He had expressed a similar controversial opinion regarding the Birmingham Six in 1988, saying: "Hanging ought to be retained for murder most foul. We shouldn't have all these campaigns to get the Birmingham Six released if they'd been hanged. They'd have been forgotten, and the whole community would be satisfied... It is better that some innocent men remain in jail than that the integrity of the English judicial system be impugned.
So hang people that you can't prove are guilty and stop the Police from being exposed as liars...what a wonderful epitaph to be remembered for.