“The starting point, in construing an Unless Order, as any other Order, is the ordinary meaning of the words used. The legal and procedural context will always be relevant: for example, the context may show that the ordinary meaning cannot have been the meaning in the Order. In any event the party who has to comply with an Order must be able to see from its terms what is required to comply with it; an Order cannot be read expansively against the party who has to comply.”
“The tribunal must decide whether it is right, in the interests of justice and the overriding objective, to grant relief to the party in default notwithstanding the breach of the unless order. That involves a broad assessment of what is in the interests of justice, and the factors which may be material to that assessment will vary considerably according to the circumstances of the case and cannot be neatly categorised. They will generally include, but may not be limited to, the reason for the default, and in particular whether it is deliberate; the seriousness of the default; the prejudice to the other party; and whether a fair trial remains possible. The fact that an unless order has been made, which of course puts the party in question squarely on notice of the importance of complying with the order and the consequences if he does not do so, will always be an important consideration. Unless orders are an important part of the tribunal’s procedural armoury (albeit one not to be used lightly), and they must be taken very seriously; their effectiveness will be undermined if tribunals are too ready to set them aside. But that is nevertheless no more than one consideration. No one factor is necessarily determinative of the course which the tribunal should take. Each case will depend on its own facts.”