Rule 13—(1) Except so far as the court below or the Court of Appeal or a single judge may otherwise direct—
(a)an appeal shall not operate as a stay of execution or of proceedings under the decision of the court below;
(b)no intermediate act or proceeding shall be invalidated by an appeal.
(2) On an appeal from the High Court, interest for such time as execution has been delayed by the appeal shall be allowed unless the Court of Appeal otherwise orders.