"The plaintiff issued the writ of subpoena in this form so as to avoid the inconveniences and disadvantages which arise from the production of documents at, and not before, the trial. For instance, the person to whom the subpoena is addressed is notified of the date of the trial and he duly attends at court on the appointed day., The trial starts, and in due course he is called to give oral evidence or to produce documents or both. Frequently the documents mentioned in the subpoena have not previously been seen by one or other, or either, of the parties. So if the documents are lengthy or numerous or of crucial importance, an adjournment is likely to become necessary to enable the parties' advisers to read the documents and obtain copies. The adjournment may be for a short while but, when the documents are voluminous, the trial may have to be adjourned for a day or longer, sometimes
a considerable period. Obviously that is very inconvenient.
There may be other reasons why production at the trial is not satisfactory. In some cases, and the present case appears to be one, a party may wish to see the documents before witness statements are prepared. Or a party may wish to see the documents before deciding whether or not to accept a payment in court, or to settle the action on particular terms. Then the absence of the documents is unsatisfactory and out of step with the modern approach. Increasingly court procedures are designed to require production of evidential material at an earlier rather than a later stage of the proceedings. The emphasis is on the parties knowing the strengths and weaknesses of each other's case as soon as possible, and not being kept in the dark until the trial, by which time increased costs will have been incurred on both sides."