Leave to appeal in labour matters may only be granted where there is a reasonable prospect of success on appeal or some other compelling reason why the appeal should be heard, as required by section 17(1) of the Superior Courts Act 10 of 2013. A reasonable prospect of success requires a sound, rational basis showing a realistic chance of success - a mere possibility, arguable case, or case that is not hopeless is insufficient. The applicant must convince the court on proper grounds that another court would come to a different conclusion on the same facts or that novel factual or legal material deserving appellate attention exists. The Labour Court must exercise caution in granting leave to appeal and must balance the competing interests of expeditious dispute resolution and the rights of the losing party.