"The common law has long accepted that evidence may be admitted at the behest of the Crown to rebut a defence of mistake, accident or innocent association. The relevant line of authority includes such well-known cases as Makin v Attorney General for New South Wales[1894] AC 57 and DPP v Boardman[1975] AC 421 . It is clear moreover that bad character evidence may be admitted under section 101(1)(d) for a similar purpose. …"
"20. In general terms, to our mind, Mr Fell's arguments overlooked one very significant matter. Section 103(1) states that 'matters in in issue' between the defendant and the prosecution for the purposes of section 101 include the question whether the defendant has a propensity. 'Matters in issue' are not limited to questions of propensity. One important matter in issue here was whether or not the appellant knew there was a firearm in the car. It was to rebut his claim that he just happened to find himself sitting above the firearm, in other words to rebut his claim of innocent association or coincidence, that the Crown in reality sought to adduce evidence of his previous convictions. The admissibility of evidence to rebut coincidence or innocent association was recognised by this court in Groves [1998] Cr LR 2000, but also more recently in Chopra[2007] 1 Cr App R 16 , whereby this court acknowledged that coincidence or unlikelihood of coincidence continued to be relevant under the provisions of theCriminal Justice Act 2003 . 21. Further, we note that the possession of firearms in this country to commit an armed robbery, although by no means unique, is still mercifully a comparatively rare offence, certainly when compared to the huge number of offences of street robberies. It was therefore a perfectly legitimate argument, in our judgment, that the appellant, who claimed to be sitting in a car which was going to be used in an armed robbery as a result of unhappy chance, had previously committed an offence of possessing a gun and had previously committed an offence of robbery. …"
"So, why have you heard about it [the previous conviction] at all? Well, [the appellant] says that it is a complete coincidence that he was with Mr Baines hours before the robbery, that it is a complete coincidence that there are certain physical and clothing similarities between what he was wearing at Homebase before the robbery and what the robber was wearing at the post office and also, of course, that he was elsewhere. And the prosecution say that when considering [the appellant's] account, bearing in mind, of course, that the burden of proof is on them, you should at least know about that previous offence." 24. "
"Mr Arnold in his address to you said that the prosecution were saying, 'Once a robber, always a robber', and, with all due respect, that probably is what the prosecution were saying. If the prosecution were saying that, I would be saying in no uncertain terms, 'No, you simply cannot say that'."