PRACTICE AND PROCEDURE — subpoena for production issued by defendants to third party (“the producing party”) — asserted failure by the producing party to comply over a period of six months — application for an authorised officer of the producing party to attend court for the purpose of examination in relation to the producing party’s asserted failure to comply with the defendants’ subpoena — producing party fails to attend court when the application is listed — whether application should proceed in the absence of the producing party — whether the defendants can establish sufficient failure to comply with the subpoena to warrant the making of an order for an authorised officer of the producing party to attend — order made for the producing party’s authorised officer to attend court for the purpose of examination in relation to compliance with the subpoena