"in my judgment in cases in which the court has to decide what are the consequences of a failure to comply with an unless order the relevant question is whether such failure is intentional and contumelious."
"Those approaches indicate the need for a defaulter, if he is to escape the consequences of failure to comply with a peremptory order, to show that in the circumstances the relevant breach was excusable if not unavoidable."
"Final, peremptory or ´unless´ orders are only made by a Court when the party in default has already failed to comply with a requirement of the rules or an order, and the Court is satisfied that the time already allowed has been sufficient in the circumstances of the case, and the failure of the party to comply with the order is inexcusable."