“(1) A party to whom a document has been disclosed may use the document only for the purpose of the proceedings in which it is disclosed except where - (a) the document has been read to or by the court, or referred to, at a hearing which has been held in public; (b) the court gives permission; or (c) the party who disclosed the document and the person to whom the document belongs agree.”
“Discovery constitutes a very serious invasion of the privacy and confidentiality of a litigant's affairs. It forms part of English legal procedure because the public interest in securing that justice is done between parties is considered to outweigh the private and public interest in the maintenance of confidentiality. But the process should not be allowed to place upon the litigant any harsher or more oppressive burden than is strictly required for the purpose of securing that justice is done.”
“Many people give assistance to the police and other investigatory agencies, either voluntarily or under compulsion, without coming within the category of informers whose identity can be concealed on grounds of public interest. They will be moved or obliged to give the information because they or the law consider that the interests of justice so require. They must naturally accept that the interests of justice may in the end require the publication of the information or at any rate its disclosure to the accused for the purposes of enabling him to conduct his defence. But there seems to me no reason why the law should not encourage their assistance by offering them the assurance that, subject to these overriding requirements, their privacy and confidentiality will be respected.”
“… I do not think that it is possible to overstate the importance, in the public interest, of ensuring that material which is disclosed in criminal proceedings is not used for collateral purposes.”