26 It is plainly the case, as the learned trial judge observed, that a party to proceedings who intends to adduce expert evidence at trial is not entitled to ignore the rules of court, or directions of the court, dealing with the time limits by which expert evidence must be disclosed. The withholding of medical reports, contrary to the rules or an order of the court, for tactical reasons is not a permissible approach and a party who takes such an approach runs a grave risk that they will not be permitted to adduce the evidence at trial. If the interests of justice require that a medical report, or medical reports, be served otherwise than in the ordinary course, that must be the subject of an application to the court to obtain an order to that effect. Special circumstances would have to exist to justify an order for delayed service. The 'cards on the table approach' to litigation is based, among other things, on the need to avoid unfairness, including the unfairness that can arise where a witness is suddenly confronted with material of which they were previously unaware and is thereby deprived of a proper opportunity to provide a response to it. It also allows the parties to assess their case realistically for the purposes of considering settlement before trial. See generally the discussion in Boyes v Colins at [53] - [85].