19 There are a number of ways in which directions can be given to the effect that jurors must act upon only the evidence presented in court, and disregard any extraneous materials which they may have seen or heard, and an appropriate direction will be tailored to the circumstances of the particular case. It may be of assistance if I refer to some matters which it will often be desirable to include in such a direction. It may be helpful to remind jurors of their oath to determine the issues in the case "according to the evidence", and to explain that material which is not either tendered as an exhibit or read into evidence or given orally as evidence from the witness box, is not evidence. Often, the judge may briefly explain to jurors the need for such a rule, observing that a trial in which the accused is not privy to some information, or only some jurors are privy to some information, is obviously not a fair one, since no one would like to be tried in secret upon evidence which they had not even heard. He or she may remind jurors of the fact that witnesses are on oath and of the way in which they have seen evidence tested in court, pointing out the difficulty of establishing whether extraneous materials are accurate without such testing. Where media reports are involved, jurors may be reminded that those quoted in the press do not always accept the accuracy of the quotation. Against that background, jurors are directed to make a determined effort to put from their minds anything which they may have seen or heard outside the court room which relates to the trial or to the accused. I do not suggest that such a direction is suited to every case. It is not his Honour's failure to do any of the things which I have mentioned which is of significance here, but rather, as I have mentioned, the implicit suggestion that only "irrelevant" extraneous material should be disregarded.