—(1)  Where in any action relating to a marine insurance policy an application for discovery of documents is made by the insurer under Rule 1 then without prejudice to its powers under that Rule, the Court may, if satisfied that the circumstances of the case are such that it is necessary or expedient to do so, make an order, either in Form 43 or in such other form as it thinks fit, for the production of such documents as are therein specified or described.