The notice by which an appeal to which this Order applies is brought may be amended by the appellant, without permission, by supplementary notice served not less than 7 days before the day appointed for the hearing of the appeal, on each of the persons on whom the notice to be amended was served.

Within 2 days after service of a supplementary notice under paragraph (1) the appellant must file two copies of the notice in the office in which the appeal is entered.

Except with the permission of the Court hearing any such appeal, no grounds other than those stated in the notice by which the appeal is brought or any supplementary notice under paragraph (1) may be relied upon by the appellant at the hearing; but that Court may amend the grounds so stated or make any other order, on such terms as it thinks just, to ensure the determination on the merits of the real question in controversy between the parties.