"(1) In any proceedings the fact that a person other than the accused has been convicted of an offence … shall be admissible in evidence for the purpose of proving that that person committed that offence, where evidence of his having done so is admissible, whether or not any other evidence of his having committed that offence is given. (2) In any proceedings in which by virtue of this section a person other than the accused is proved to have been convicted of an offence by or before any court in the United Kingdom, he shall be taken to have committed that offence unless the contrary is proved." "(1). In any proceedings the court may refuse to allow evidence on which the prosecution proposes to rely to be given if it appears to the court that, having regard to all the circumstances … the admission of the evidence would have such an adverse effect on the fairness of the proceedings that the court ought not to admit it."
"18. It remains a proper approach, we are satisfied, that if there is no real question but that the offence was committed by someone and the real issue is whether the present defendant is party to it or not, evidence of pleas of guilty is likely to be perfectly fair, though of course each case depends upon its own facts. However, it also remains true that such evidence may well be unfair if the issues are such that the evidence closes off the issues that the jury has to try. …"
"Question 1 Are you sure that the [appellant] participated jointly with Michael Gath in a robbery, either from the outset, or at some subsequent stage? If no, not guilty of murder or manslaughter. If yes, got to question 2. Question 2 Are you sure that when the [appellant] participated in the robbery, at any stage, he realised that there was a real risk that Michael Gath might cause the [deceased] really serious bodily harm with, at least, the intention to cause really serious bodily harm? If yes, guilty of murder. If no, go to question 3."
"In cases of secondary liability arising out of a prior joint criminal venture, it will also often be necessary to draw the jury's attention to the fact that the intention to assist, and indeed the intention that the crime should be committed, may be conditional. The bank robbers who attack the bank when one or more of them is armed no doubt hope that it will not be necessary to use the guns, but it may be a perfectly proper inference that all were intending that if they meet resistance the weapons should be used with the intent to do grievous bodily harm at least. …"