(1)The missing person’s spouse, civil partner, parent, child or sibling may intervene in—
(a)proceedings on an application for a guardianship order;
(b)proceedings relating to the variation or revocation of a guardianship order;
(c)other proceedings relating to the exercise of functions by a guardian.
(2)Any other person may intervene in such proceedings only with the permission of the court.
(3)The court must refuse permission to intervene if it considers that the applicant does not have a sufficient interest in relation to the missing person’s property or financial affairs.
(4)References in this section to intervening in proceedings include arguing before the court any question which the court considers it necessary to have fully argued for the purposes of the proceedings.