Failure to prosecute appeal
12. Where an appellant, having obtained an order granting him conditional leave to appeal, and having complied with the conditions imposed on him by such order, fails thereafter to apply with due diligence to the Court for an order granting him final leave to appeal, the Court may, on an application in that behalf made by the respondent, rescind the order granting conditional leave to appeal notwithstanding the appellant's compliance with the conditions imposed by such an order, and may give such directions as to the costs of the appeal and security entered into by the appellant as the Court shall think fit, or make such further or other in the premises as, in the opinion of the Court, the justice of the case requires.