"(1) In the determination of his civil rights and obligations or of any criminal charge against him, everyone is entitled to a fair and public hearing within a reasonable time by an independent and impartial tribunal established by law. Judgment shall be pronounced publicly but the press and public may be excluded from all or part of the trial in the interest of morals, public order or national security in a democratic society, where the interests of juveniles or the protection of the private life of the parties so require, or the extent strictly necessary in the opinion of the court in special circumstances where publicity would prejudice the interests of justice. (2) Everyone charged with a criminal offence shall be presumed innocent until proved guilty according to law. (3) Everyone charged with a criminal offence has the following minimum rights: (a) to be informed promptly, in a language which he understands and in detail, of the nature and cause of the accusation against him; (b) to have adequate time and facilities for the preparation of his defence; (c) to defend himself in person or through legal assistance of his own choosing or, if he has not sufficient means to pay for legal assistance, to be given it free when the interests of justice so require; (d) to examine or have examined witnesses against him and to obtain the attendance and examination of witnesses on his behalf under the same conditions as witnesses against him; (e) to have the free assistance of an interpreter if he cannot understand or speak the language used in court."
"In our view the relative use of civil or criminal investigation techniques is a matter for Customs and Excise to regulate, weighing the competing calls on their resources, the nature of the frauds suspected and the extent to which criminal or civil investigation techniques are capable of turning up sufficient admissible evidence to satisfy the respective burdens of proof for criminal or civil proceedings. Whether investigators should switch from the civil to the criminal mode, or vice versa, in the course of an investigation, as may happen now in direct tax investigations, seems to us also essentially a matter for the Department, in the light of experience and the views and thoughts of Tribunals as to fairness to the accused in the circumstances of a particular case."
"It is, however, wrong to hold that because a matter could have been raised in earlier proceedings it should have been, so as to render the raising of it in later proceedings necessarily abusive. That is to adopt too dogmatic an approach to what should in my opinion be a broad, merits-based judgment which takes account of the public and private interests involved and also takes account of all the facts of the case, focusing attention on the crucial question whether, in all the circumstances, a party is misusing or abusing the process of the court by seeking to raise before it the issue which could have been raised before. As one cannot comprehensively list all possible forms of abuse, so one cannot formulate any hard and fast rule to determine whether, on given facts, abuse is to be found or not. Thus while I would accept that lack of funds would not ordinarily excuse a failure to raise in earlier proceedings an issue which could and should have been raised then, I would not regard it as necessarily irrelevant, particularly if it appears that the lack of funds has been caused by the party against whom it is sought to claim. While the result may often be the same, it is in my view preferable to ask whether in all the circumstances a party's conduct is an abuse than to ask whether the conduct is an abuse and then, if it is, to ask whether the abuse is excused or justified by special circumstances. Properly applied, and whatever the legitimacy of its descent, the rule has in my view a valuable part to play in protecting the interests of justice."
"In Yat Tung Investment Co. Ltd. v. Dao Heng Bank Ltd .[1975] AC 581 , the Privy Council upheld the application by the Supreme Court of Hong Kong of the doctrine of res judicata in the wider sense, namely, that it would be an abuse of the process of the court to raise in subsequent proceedings matters which could and should have been litigated in earlier proceedings. Lord Kilbrandon, giving the judgment of their Lordships, gave warning, at p. 590: 'The shutting out of a 'subject of litigation' [was] a power which no court should exercise but after a scrupulous examination of all the circumstances...' He continued that the exercise of such a power 'is limited to cases where reasonable diligence would have caused a matter to be earlier raised; moreover, although negligence, inadvertence or even accident will not suffice to excuse, nevertheless 'special circumstances' are reserved in case justice should be found to require the non-application of the rule.'"