(1) This rule applies if an appellant wants to abandon a ground of appeal.
(2) The appellant must give notice to each other party to the appeal that the ground of appeal will not be relied on.
(3) The notice must be given—
(a) as soon as possible; but
(b) if the appeal is not to be decided by written cases under part 5.8 (Written cases)—within a reasonable time before the day set for the start of the hearing.
(4) The Supreme Court may make any order the court considers appropriate in an appeal in a civil proceeding in relation to costs incurred because of a failure by the appellant to comply with this rule.