The 'rule of thumb' for apportioning costs among multiple defendants (where the plaintiff succeeds against some but not others) is no more than a guide, not a binding rule of law, and its application depends on the circumstances of each case. It has its origins in Chancery practice where the same solicitor acted for all defendants and may not apply where defendants are separately represented. A consent costs order in usual form requiring one party to pay another's costs of the proceedings covers all costs including interlocutory applications in which the costs-receiving party was successful. Unmeritorious applications for judicial review of costs determinations, particularly after multiple levels of review, may attract indemnity costs.
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