Printers and Newspapers Act 1984

Where a person commences an action in a court for the discovery of the name of a person concerned in a newspaper as printer, publisher or otherwise, or a matter relating to the printing or publishing of the newspaper, in order to enable him the more effectively to bring or carry on an action for damages by him alleged to have been sustained by reason of a libellous matter concerning him contained in the newspaper, the defendant shall not be permitted to plead or demur to the claim, but shall be compellable to make the discovery required, but such discovery shall not be used for a purpose in a proceeding other than that in which the discovery is made.