The rejection of a Calderbank offer is not unreasonable where the offeree's claim at law remains unresolved, even if the claim is otherwise weak. Once the claim at law is resolved against the offeree, rejection of a reasonable offer becomes unreasonable where the remaining claim is very weak. A non-party costs order against a controlling director of an impecunious corporate plaintiff may be made subject to a proviso that the director's liability does not arise until the company fails to meet its costs obligations.
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