Upon any application for an adoption order, if the court considers that the application should be granted, it shall in the first instance make an interim order in favour of the applicant or applicants:
provided that the court may in any case make an adoption order without first making an interim order, if—
(a)
all the conditions of this Act governing the making of an interim order have been complied with; and
(b)
special circumstances render it desirable that an adoption order should be made in the first instance.