EWCA Crim 2796
It was not necessary for judges passing sentence for diminished responsibility manslaughter to set out an exact arithmetical computation of the sentence which would have been passed for a murder conviction. Whether or not the computation was set out, it provided a helpful method of approach, identifying the aggravating and mitigating features, and then applying an appropriate discount for the defendant's reduced level of culpability. That was a fact-specific decision, to be made by the judge, consistently with the medical evidence and the jury verdict, and then publicly explained.
CA (Crim Div) (Lord Judge LCJ, Royce J, Globe J)