An application for permission to appeal or a notice of appeal may be withdrawn with the written consent of all parties or with the permission of the Court on such terms as appear appropriate.

The Court may set aside or vary the order appealed from by consent and without an oral hearing if satisfied that it is appropriate so to do.

In this rule “a notice of appeal” includes an application for permission to appeal or cross-appeal which (under rule 18 or rule 25) stands as a notice of appeal or cross-appeal.