“65. In my judgment, it cannot be axiomatic in this context that even the gist of the relevant information must be supplied to any person (such as the occupier or some other person claiming some proprietary, possessory or other interest in the documents) claiming to be affected by, and wishing to object to, the warrant or the search and seizure. Every case must of course be considered in the light of its particular circumstances. But, as a general proposition, I answer issue (v) in the negative.”