21.7—(1) The court may—
(a)direct that a person may not act as a litigation friend;
(b)terminate a litigation friend’s appointment;
(c)appoint a new litigation friend in substitution for an existing one.
(2) An application for an order under paragraph (1) must be supported by evidence.
(3) The court may not appoint a litigation friend under this rule unless it is satisfied that the person to be appointed complies with the conditions specified in rule 21.4(3).