R v Khan [2009] EWCA Crim 1569
(1) The judge had been right to refuse to withdraw the charge of murder from the jury at the close of the evidence: to do otherwise he would have to be satisfied that the evidence, both medical and factual, was such that no reasonable jury, properly directed, could conclude that the defendant had failed to prove, on a balance of probabilities, the diminished responsibility defence. (2) Although the medical evidence in favour of diminished responsibility was unchallenged, there was ample factual evidence on which the jury could conclude that it was not satisfied, on a balance of probabilities, that the defence was made out.