This test was again adopted by the English Court of Appeal in R v Brown (Winston) [1998] AC 367. I take the second category to be intended to refer to a new issue that would not be apparent to the accused person from the evidence the prosecution proposes to use - that is, a new issue that becomes apparent by reason of the material whose disclosure is in question.
18 The issue of the prosecution's duty of disclosure came before the High Court of Australia in Grey v The Queen [2001] HCA 65; 75 ALJR 1708, but in circumstances in which the Crown conceded that the undisclosed material there in question was of a kind which ought to have been disclosed; the High Court was thus concerned with the consequences of the admittedly erroneous non-disclosure, and not with defining the extent of the obligation.
19 More recently, this Court (in a bench of which I was a member) considered the extent of the Crown's duty of disclosure in R v Reardon [2004] NSWCCA 197 (unreported, 23 June 2004). Hodgson JA extensively reviewed the principles stated in these and other English authorities and (at [54]), while declining to state a conclusion about whether all the views expressed in those authorities should be adopted by this Court, expressly adopted the test posited initially in Melvin and Dingle and endorsed in Keane and Brown.
20 It needs to be acknowledged that his Honour's adoption of that test was, strictly, obiter. In a segment of the judgment with which Barr J and I agreed, his Honour had already held that this Court had no power to embark upon the process sought by that appellant (which was to reopen a perfected appeal). Further, because of the approaches we took to the question of substance, neither Barr J nor I expressly agreed with Hodgson JA's proposed adoption of the Melvin and Dingle test. Accordingly, it is appropriate now to state, for myself, that I agree that that test correctly encapsulates, for NSW, the prosecution's duty of disclosure.
21 Of the three categories identified as categories of material which ought to be disclosed the third can, for the purposes of the present case, be discarded from consideration. For the appellant to succeed in showing that the Crown was obliged to disclose the statement of Mr Duncan and the videotape, it is necessary that it establish that they fell into either the first or the second of the Melvin and Dingle categories. That is, that they were relevant, or possibly relevant, to an (existing and identified) issue in the case, or to raise, or possibly raise, a new issue whose existence would not be apparent from the evidence that the prosecution proposes to use.
22 As to the first, two issues present themselves as possibly relevant: (i) the credibility of the appellant; and (ii) the appellant's ability (as at 17 November 2002) to use his left arm as the complainant asserted he had used it during the attack upon her.
23 In Brown it was held that the prosecution duty of disclosure did not extend to disclosing material relevant only to the credibility of defence (as distinct from prosecution) witnesses. Even less, in my view, does the duty extend to disclosing material relevant only to the credibility of the accused person himself or herself; and even less does it extend to obliging the Crown to disclose material that would deter an accused person from giving false evidence or raising an issue of fact which might be shown to be false.
24 In Brown, Lord Hope of Craighead, with the concurrence of all other members of the House of Lords, said:
"The rules of disclosure which have been developed by the common law owe their origin to the elementary right of every defendant to a fair trial. If a defendant is to have a fair trial he must have adequate notice of the case which is to be made against him ... the great principle is that of open justice. It would be contrary to that principle for the prosecution to withhold from the defendant material which might undermine their case against him or which might assist his defence ." (emphasis added)
25 The reference to material which might assist the defence has to be considered in the context of the trial under consideration. The Crown cannot be expected to disclose material in its possession which might assist a defence of which it has no notice, and cannot be expected to foresee. Here, the appellant declined to be interviewed by police and did not expressly reveal what his defence might be. That said, having regard to the DNA and fingerprint evidence, the Crown might reasonably have foreseen that, if the appellant were to persist in defending the charge, the only avenue of defence open to him was to claim that the activity was consensual. But that is not an answer to the question of what it was that it is now suggested the Crown ought reasonably to have foreseen. What it is now suggested the Crown ought to have foreseen was that the appellant would assert that he condition of his left arm in November 2002 rendered him physically incapable of restraining the complainant as she alleged he did, and, further, that he would seek to support that assertion by claiming that, as at the date of trial, that incapacity remained with him. Then, it is suggested, the Crown ought, in discharge of its duty of disclosure, have alerted the appellant to its knowledge of his capacity, in 16 September 2003, to do push-ups, in order to deflect him from making that false assertion.
26 It is worth stating the sequence of events. It was: