The applicant, Hugh Glenister, brought an application in terms of Rule 42 of the Uniform Rules of Court seeking a variation of a costs order made by the Constitutional Court in Glenister II (2011). Although he had been successful in the main constitutional challenge and was awarded costs (including two counsel), the costs order did not include the qualifying fees of an expert witness. The applicant contended that this omission was a mistake, as expert costs had been requested in the notice of motion and heads of argument. He argued that the expert’s services were necessary and useful, and that the general rule that costs follow the event should apply.