“(1) Proceedings or any part of them shall take place in the absence of any party, including a party who is a child, if – (a) the court considers it in the interests of the party, having regard to the matters to be discussed or the evidence likely to be given; and … (a) the court considers it in the interests of the party, having regard to the matters to be discussed or the evidence likely to be given; and (4) Where, at the time and place appointed for a hearing or directions appointment, one or more of the respondents appear but the applicant does not, the court may refuse the application or, if sufficient evidence has previously been received, proceed in the absence of the applicant. …”