"It is important to note the emphasis in the Golds judgment not only on the prosecution's right (if not duty) to assess the medical evidence and to challenge it, where there is a rational basis for so doing, but also on the primacy of the jury in determining the issue. It is clear that a judge should exercise caution before accepting the defence of diminished responsibility and removing the case from the jury (see paragraph 50). The fact that the prosecution calls no evidence to contradict a psychiatrist called by the defence is not in itself sufficient justification for doing so. In the light of the judgment in Golds, we see no reason not to follow the broad approach of this court in R v Khan (Dawood)[2009] EWCA Crim 1569 … to which reference was made in Brennan, which we would express as follows: it will be a rare case where a judge will exercise the power to withdraw a charge of murder from the jury when the prosecution do not accept that the evidence gives rise to the defence of diminished responsibility."
"We agree, that if the offence did not take place as [the appellant] describes it, (e.g. if there was pre-planning and no provocation), that the conditions above may well be irrelevant. We agree that the defence would not be available to the [appellant] if her account is not largely accepted."
"(1) Where a person ("
"25……the wording of section 54(1)(c) is clear: in assessing the third component, the defendant is to be judged against the standard of a person with a normal degree, and not an abnormal degree, of tolerance and self-restraint. If, and in so far as, a personality disorder reduced the defendant's general capacity for tolerance or self-restraint, that would not be a relevant consideration. Moreover, it would not be a relevant consideration even if the personality disorder was one of the 'circumstances' of the defendant because it was relevant to the gravity of the trigger (for which, see Wilcocks). Expert evidence about the impact of the disorder would be irrelevant and inadmissible on the issue of whether it would have reduced the capacity for tolerance and self-restraint of the hypothetical 'person of D's sex and age, with a normal degree of tolerance and self-restraint'. 26. Fourth, if a mental disorder has a relevance to the defendant's conduct other than a bearing on his general capacity for tolerance or self-restraint, it is not excluded by subsection (3), and the jury will be entitled to take it into account as one of the defendant's circumstances under section 54(1)(c). However, it is necessary to identify with some care how the mental disorder is said to be relevant as one of the defendant's circumstances. It must not be relied upon to undermine the principle that the conduct of the defendant is to be judged against 'normal' standards, rather than the abnormal standard of an individual defendant. It follows that we reject Mr Griffiths' argument that, if a disorder is relevant to, say, the gravity of the qualifying trigger, and evidence of the disorder is admitted in relation to the gravity of the trigger, the jury would also be entitled to take it into account in so far as it bore on the defendant's general capacity for tolerance and selfrestraint. The disorder would be a relevant circumstance of the defendant, but would not be relevant to the question of the degree of tolerance and self-restraint which would be exercised by the hypothetical person referred to in section 54(1)(c). 27. As we have indicated, the most obvious example of when evidence of a mental disorder may be relevant to the defendant's circumstances is the one mentioned in Holley and Wilcocks, where the disorder was relevant to the gravity of the qualifying trigger. In Holley, the Board accepted that in the case of a woman suffering from 'Battered Woman's Syndrome' or a personality disorder, who killed her abuser, evidence of her condition may be relevant to both the loss of self-control and to the gravity of the provocation for her. In Wilcocks, the trial judge, and this Court, accepted that, if a personality disorder had caused the defendant to attempt suicide and he had been taunted by the deceased about committing suicide, then the jury was entitled to take it into account as one of his circumstances in considering the third stage of the defence. 28. We do not exclude the possibility of other circumstances where a disorder might be relevant to the third component, but none have been put before us. This suggests the question is of academic interest only. 29. Finally, the exclusionary effect of subsection (3) is consistent with, and reinforced by, the availability and scope of the partial defence of diminished responsibility insection 2 of the Homicide Act 1957 , as amended by section 52 of the 2009 Act. The amended section 2 applies where a mental disorder substantially impairs the ability of the defendant to exercise self-control. The two defences may be presented together as alternatives. The law does not therefore ignore a mental disorder that, through no fault of a defendant, renders him or her unable to exercise the degree of self-control of a 'normal' person."
"Can I just warn you to be cautious in relation to that matter, in this sense: that the brutality of the attack may assist you on the issue of intent. Equally, it may be a reflection of her mental disorder. That is something that you are going to have to assess."
"It is for you to evaluate and assess this evidence. It is for you to decide whether it assists you or not. If, after having given the matter careful consideration, you do not accept the evidence of the expert, in theory you do not have to act upon it. This is trial by jury, not trial by expert. While you may accept or reject expert opinion evidence you must not substitute your own opinions for those of the expert. However, in the present case the primary findings of the experts are not in dispute, so you would have to think long and hard before rejecting them."