‘36. There is no guidance in theChildren Act 1989 or theFamily Procedure Rules 2010 which specifically assists as to the approach that should be taken to an application for joinder and the welfare of the child is not the paramount consideration in either an application for party status or an application for leave to make a substantive application because neither of these applications involves the court in determining "any question with respect to….the upbringing of a child"… 39. …section 10(9) does not contain anything in the nature of a test by which an application should be judged, nor even criteria which must be satisfied before leave can be given, nor is anything of the kind to be derived from the rest of section 10. Neither does the subsection circumscribe the factors that can be taken into account in determining the leave application; it leaves the court to take into account all the material features of the case and merely highlights certain matters which are of particular relevance… 48. …I do not see section 10(9) as containing a test. By picking out some factors to which the court should have "particular regard", it acknowledges by implication that there may be other factors which the court has to consider. It would be wrong, in my view, to try to list or limit these factors which will vary infinitely from case to case. One amongst them is plainly the prospects of success of the application that is proposed; leave will not be given for an application that is not arguable. I do not intend to attempt a definition of what is arguable but I would make a few observations before I leave the question of the proper approach to an application to which section 10(9) applies, whether directly or through an application to be joined as a party with a view to seeking the sort of outcome that could be the subject of a section 8 order. 49. The first observation is that the fact that a person has an arguable case may not necessarily be sufficient to entitle him or her to leave under section 10 or to joinder as a party. I say this because section 10(9) picks out other factors as requiring particular regard and I think it must follow that there may be situations in which, when the judge exercises his or her discretion, balancing all the relevant factors, the presence of an arguable case is outweighed by those other factors or, indeed, by any other factor that carries particular weight in the individual circumstances of the case. Suppose, for example, that the applicant wishes to advance a barely arguable case with many attendant problems in relation to a child with special needs who is securely placed with an irreplaceable long term family who will be unable to withstand the rigours of any further litigation. 50. The second observation is that there is room, in cases concerning children, for applications or proposed applications to be checked at a very early stage and without wholesale investigation. The court has a broad discretion to conduct the case as is most appropriate given the issues involved and the evidence available, see for example Re B (Minors((Contact)[1994] 2 FLR 1 , Re C (Contact: Conduct of Hearings)[2006] 2 FLR 289 and Re N; A v G and N[2009] EWHC 1807 (Fam) …’
‘A re-introduction of the relationship between Alice and Matthew needs to be sustainable and it is imperative that there are significant benefits to Alice in promoting [contact with Matthew] given the extensive number of adult relationships that already exist for her.’