[57] I leave open the possibility of making a direction for further disclosure by reference to categories of documents, including some of the categories contained in the appendix to Columbia's submissions. However, before making any order for further disclosure by reference to categories, or any other order for further disclosure, the party seeking such an order will need to make out a case for it. The party against whom such an order is sought should be given adequate notice of it so as to enable a realistic estimate to be made of the likely costs of locating, assembling, reviewing and providing such additional documents. Depending upon the circumstances, it may be appropriate to direct that the costs associated with locating, assembling, reviewing and providing such additional documents be paid by the requesting party. However, if the request is a legitimate one, and arises because of a failure by a party to comply with orders that have been made in relation to disclosure or the unhelpful form in which disclosure has been given, then it would not be appropriate to make such a cost-shifting order.